Welcome to LookChem.com Sign In|Join Free
  • or
Home > Others > 7440 > 

7440-21-3

Basic Information
CAS No.: 7440-21-3
Name: Silicon
Article Data: 757
Molecular Structure:
Molecular Structure of 7440-21-3 (Silicon)
Formula: Si
Molecular Weight: 32.1173
Synonyms: silicon metal;4FY;Aldrich 267414-25G;Biosilicon;CZ-N Polished wafer;FEB 450D;GKO 3516A;HGH600;Hexsil;JT 02;KDB 0.1;KDB 0.5;KDB 10;KDB 20;KR 1;Metasilicon 325A;PHC20;Polysilicon;SI 1059;SILSO;Sharp 80W;Si(100) wafer;Sicomill 4C-P;Sicomill Grade 2;Silgrain;Silgrain HQ;Silgrain Standard;Silicon 100;Silicon element;Polyeristalline silicon powder;
EINECS: 231-130-8
Density: 2.33 g/cm3
Melting Point: 1410 °C
Boiling Point: 2355 °C
Solubility: insoluble in water
Appearance: grey lustrous solid or grey powder
Hazard Symbols: FlammableF,ToxicT
Risk Codes: 11
Safety: 26-36/37-45-7/9-33-16-36
Transport Information: UN 2922 8/PG 2
PSA: 0.00000
LogP: 0.00000
Synthetic route
4109-96-0

Dichlorosilane

7440-21-3

silicon

Conditions
ConditionsYield
Prepd. by laser chemical vapor pptn. at atmospheric pressure.;100%
In neat (no solvent) chemical vapor deposition with a mixt. of SiH2Cl2 and H2;
With hydrogen chemical vapor deposition (hot-wall reactor, basic pressure 10 or 76 Torr, 1223 K);
10025-78-2

trichlorosilane

7440-21-3

silicon

Conditions
ConditionsYield
Stage #1: trichlorosilane under 3.75038 Torr; for 6h; Pulsed microwave radiation (25-50W);
Stage #2: With hydrogen at 900℃;
96.7%
With hydrogen chemical vapor deposition (8% SiHCl3 in H2, 1100°C);
With hydrogen chemical vapor deposition (hot-wall reactor, basic pressure 10 or 76 Torr, 1223 K);
Conditions
ConditionsYield
With magnesium oxide; magnesium In neat (no solvent) mixt. of 180 parts SiO2, 144 parts Mg and 81 parts MgO, covered with a layer of Mg in a warmed up crucible, heating at red heat in a electric furnace, begin of the react. after 2-3 min. with strong glowing, best yields with a SiO2 grainsize of 0.14mm;; treatment of the reactionproduct with HCl, H2SO4 and HF one after another, Si powder of 99.09-99.60% purity;;92.7%
With Mg; MgO In neat (no solvent) mixt. of 180 parts SiO2, 144 parts Mg and 81 parts MgO, covered with a layer of Mg in a warmed up crucible, heating at red heat in a electric furnace, begin of the react. after 2-3 min. with strong glowing, best yields with a SiO2 grainsize of 0.14mm;; treatment of the reactionproduct with HCl, H2SO4 and HF one after another, Si powder of 99.09-99.60% purity;;92.7%
With magnesium Inert atmosphere; Schlenk technique;46.7%
10026-04-7, 53609-55-5

tetrachlorosilane

7440-21-3

silicon

Conditions
ConditionsYield
With hydrogen at 700℃; under 15.0015 Torr; Product distribution / selectivity; Microwave radiation (200W);60%
Product distribution / selectivity;
With KBr or KI In neat (no solvent) byproducts: KCl, Br; uncomplete reaction of SiCl4 with KBr or KI at 300-400 °C;;
34557-54-5

methane

7440-21-3

monosilane

silicon carbide

B

7440-21-3

silicon

Conditions
ConditionsYield
With H2 In neat (no solvent) chemical vapour deposition of CH4 (4.0 mol%), H2 and SiH4 (2.0 mol%) gases in reaction-sintered SiC tube within mullite tube in resistance furnace, total gas flow rate 2.7E-5 m**3/sec, total gas pressure 0.1 MPa, 1623K; transmission electron microscopy, pycnometry, IR spectroscopy, X-ray diffractometry;A 23%
B n/a
With H2 In neat (no solvent) chemical vapour deposition of CH4 (7.2 mol%), H2 and SiH4 (3.6 mol%) gases in reaction-sintered SiC tube within mullite tube in resistance furnace, total gas flow rate 2.7E-5 m**3/sec, total gas pressure 0.1 MPa, 1623K; transmission electron microscopy, pycnometry, IR spectroscopy, X-ray diffractometry;A 19%
B n/a
With H2 In neat (no solvent) chemical vapour deposition of CH4 (4.0 mol%), H2 and SiH4 (2.0 mol%) gases in reaction-sintered SiC tube within mullite tube in resistance furnace, total gas flow rate 2.7E-5 m**3/sec, total gas pressure 0.1 MPa, 1573K; transmission electron microscopy, pycnometry, IR spectroscopy, X-ray diffractometry;A 14%
B n/a

sodium metasilicate nonahydrate

7439-95-4

magnesium

A

magnesium hydroxide

B

1333-74-0

hydrogen

C

magnesium oxide

D

1310-73-2

sodium hydroxide

E

7440-21-3

silicon

Conditions
ConditionsYield
at 200℃; under 116262 Torr; for 10h; Temperature; Autoclave;A n/a
B n/a
C n/a
D n/a
E 10%
7440-21-3

monosilane

A

7783-26-8

trisilane

B

disilane

C

7440-21-3

silicon

Conditions
ConditionsYield
In gaseous matrix byproducts: H2; other Radiation; photolysis of pure SiH4 or a 37% mixture with N2 or Ar or H2 or He (total pressure = 80 Torr) in stainless steel cell by cw CO2 laser (945.98 cm**-1=IR), strong luminescence accompanies the react.; traces of higher silanes (gases) and solid hydrogenated silicon also present, H2 or He inhibit the react.;A 0%
B 2%
C n/a

molybdenium disilicate

A

pentamolybdenum trisilicide

B

7440-21-3

silicon

Conditions
ConditionsYield
In neat (no solvent) evapn. in N2-plasma-flow; detd. by X-ray diffraction;A 1%
B 1%
10026-04-7, 53609-55-5

tetrachlorosilane

A

silicon, oxidized

silicon, oxidized

B

7440-21-3

silicon

Conditions
ConditionsYield
Product distribution / selectivity;
7440-21-3

monosilane

7440-21-3

silicon

Conditions
ConditionsYield
at 1000℃; under 810.081 Torr; Gas phase (argon/H2 or argon alone);
With diborane at 1000℃; under 810.081 Torr; Gas phase (H2/argon);
With tri-tert-butyl phosphine at 1000℃; under 810.081 Torr; Gas phase (H2/argon);
  • Silicon

  • Casno:

    7440-21-3

    Silicon

    Min.Order: 1 Kilogram

    FOB Price:  USD $ 3.0-3.0

    DayangChem exported this product to many countries and regions at best price. If you are looking for the material's manufacturer or supplier in China, DayangChem is your best choice. Pls contact with us freely for getting detailed product spe

    Dayang Chem (Hangzhou) Co.,Ltd. dedicated to the development, production and marketing of chemicals which is specialized in Organic compounds; Active Pharmaceutical Ingredi

  •  Dayang Chem (Hangzhou) Co.,Ltd.

     China (Mainland)  |  Contact Details

    Business Type:Lab/Research institutions

    Tel:+86-571-88938639

    Address:9/F, Unit 2 Changdi Torch Building, 259# WenSan Road, Xihu District, Hangzhou City 310012, P.R.China

       Inquiry Now

  • high purity 7440-21-3 silicon

  • Casno:

    7440-21-3

    MSDS/COA Download

    high purity 7440-21-3 silicon

    Min.Order: 1 Kilogram

    FOB Price:  USD $ 1.9-2.5

    Items Standard Result Appearance gray powder Complies Particle size 1.58um Complies

    Hangzhou Dingyan Chem Co., LTD. is located in the beautiful tourist city of hangzhou, is a comprehensive chemical enterprice which doing import and export business by its own comp

  •  Hangzhou Dingyan Chem Co., Ltd

     China (Mainland)  |  Contact Details

    Business Type:Trading Company

    Tel:86-571-86465881,86-571-87157530,86-571-88025800

    Address:RM.1118,NO.1 Building, Baiyun Tower,Jianggan Area, Hangzhou city, China,310004

       Inquiry Now

  • High quality Silicon 99.99%

  • Casno:

    7440-21-3

    High quality Silicon 99.99%

    Min.Order: 1 Kilogram

    FOB Price:  USD $ 0.0-0.0

    Welcome to Simagchem, your partner in China as a premier supply of bulk specialty chemicals for industry and life science. We introduce experienced quality product and exceptional JIT service with instant market intelligence in China to benefit our

    Welcome to Simagchem, your partner in China as a premier supply of bulk specialty chemicals for industry and life science. We introduce experienced quality product and exceptional

  •  Simagchem Corporation

     China (Mainland)  |  Contact Details

    Business Type:Manufacturers

    Tel:+86-592-2680277

    Address:21/F Hualong Office Building,No.6 Hubin East Road, Xiamen,China

       Inquiry Now

  • SILICON

  • Casno:

    7440-21-3

    SILICON

    Min.Order: 1 Kilogram

    FOB Price:  USD $ 0.0-0.0

    T he company has advanced technology, as well as a large number of excellent R & D team, to provide customers from the grams to one hundred kilograms and tons of high-quality products, competitive prices and quality service Appearance:white

    Located in Zhengdong New District,?Zhengzhou of Henan province, Henan Allgreen Chemical Co.,Ltd is a comprehensive high-tech modern enterprises integrating professional R&D, pro

  •  Henan Allgreen Chemical Co.,Ltd

     China (Mainland)  |  Contact Details

    Business Type:Manufacturers

    Tel:+86-0371-87507775

    Address:No 260 Dongming Road,Jinshui District

       Inquiry Now

  • Factory Supply Silicon

  • Casno:

    7440-21-3

    Factory Supply Silicon

    Min.Order: 1

    FOB Price:  USD $ 0.0-0.0

    The above product is Ality Chemical's strong item with best price, good quality and fast supply. Ality Chemical has been focusing on the research and production of this field for over 14 years. At the same time, we are always committed to providi

    Ality Chemical, established in 2007, is a comprehensive Chemical Production&Supply Group with Patent Technology as its core. Ality Chemical operates sales branches in Shanghai, Xia

  •  Ality Chemical Corporation

     China (Mainland)  |  Contact Details

    Business Type:Other

    Tel:0513-87616220

    Address:Fine chemical industry park, Nantong,Jiangsu

       Inquiry Now

  • Silicon

  • Casno:

    7440-21-3

    Silicon

    Min.Order: 5 Kiloliter

    FOB Price:  USD $ 1.2-5.0

    Our main production base is located in Xuzhou industry park. We are certified both to the ISO 9001 and ISO 14001 Standards, have a safety management system in place.Our R&D team masters core technology for process-design of target building block

    Our main production base is located in Xuzhou industry park. We produce a wide range of organics including Fine chemicals, Active pharmaceutical ingredients(APIs), Veterinary, In

  •  Chemwill Asia Co., Ltd.

     China (Mainland)  |  Contact Details

    Business Type:Manufacturers

    Tel:021-51086038

    Address:High-Tech Industrial park,Chemical Economical Development Zone,Xuzhou, Jiangsu-Province, P.R.China

       Inquiry Now

  • Factory supply  Silicon

  • Casno:

    7440-21-3

    Factory supply Silicon

    Min.Order: 1 Kilogram

    FOB Price:  USD $ 0.0-0.0

    Silicon CAS: 7440-21-3 Superiority mp 1410 °c(lit.) bp 2355 °c(lit.) density 2.33 g/ml at 25 °c(lit.) storage temp. flammables area form powder water solubility ins

    Lonwin industry group limited.is a comprehensive chemical enterprise which mainly integrates development, production, marketing ,import and export business. The company is located

  •  Lonwin Chemical Group Limited

     China (Mainland)  |  Contact Details

    Business Type:Other

    Tel:Tel: 86-21-59858395

    Address:No#966,Huaxu Road,Shanghai 201702,P.R.China

       Inquiry Now

  • Silicon

  • Casno:

    7440-21-3

    Silicon

    Min.Order: 0 Metric Ton

    FOB Price:  USD $ 0.0-0.0

    Hangzhou KeyingChem Co., Ltd. exported this product to many countries and regions at best price. If you are looking for the material’s manufacturer or supplier in China, KeyingChem is your best choice. Pls contact with us freely for getting det

    Hangzhou Keying Chem Co., Ltd. Is a comprehensive enterprise, dedicated to the development, production and marketing of chemicals. As a technology innovative and service profession

  •  Hangzhou Keyingchem Co.,Ltd

     China (Mainland)  |  Contact Details

    Business Type:Lab/Research institutions

    Tel:+86-571-85378921

    Address:Jintong international Building, No.113,Huayuangang Street, Gong shu District, Hangzhou,Zhejiang, China.

       Inquiry Now

  • High quality Silicon

  • Casno:

    7440-21-3

    High quality Silicon

    Min.Order: 10 Gram

    FOB Price:  USD $ 100.0-100.0

    Zibo Hangyu Biotechnology Development Co., Ltd is a leading manufacturer and supplier of chemicals in China. We develop produce and distribute high quality pharmaceuticals, intermediates, special chemicals and OLED intermediates and other fine chemi

    Hangyu Biotech is a leading manufacturer and supplier of chemicals in China. We develop produce and distribute high quality pharmaceuticals, intermediates, special chemicals and O

  •  Zibo Hangyu Biotechnology Development Co., Ltd

    China (Mainland)  |  Contact Details

    Business Type:Lab/Research institutions

    Tel:86-15965530500

    Address:Room1701, Tianxing Building,Licheng district, jinan, Shandong, China

       Inquiry Now

  • Silicon

  • Casno:

    7440-21-3

    Silicon

    Min.Order: 1 Kilogram

    FOB Price:  USD $ 0.0-0.0

    Superior quality, moderate price & quick delivery. Appearance:grey lustrous solid or grey powder Storage:Stored in cool, dry and ventilation place; Away from fire and heat Package:5Kg/bag, 1MT/bag or as your requirement Application:Is a raw mat

    Hangzhou Yunuo Chemical Co., Ltd. is located in Hangzhou City, China We are specialized in fine chemicals and basic chemical auxiliary materials, Organic compounds, rubber

  •  HANGZHOU YUNUO CHEMICAL CO.,LTD

     China (Mainland)  |  Contact Details

    Business Type:Trading Company

    Tel:0571-83715115

    Address:hangzhou

       Inquiry Now

  • TIANFU-CHEM Silicon

  • Casno:

    7440-21-3

    TIANFU-CHEM Silicon

    Min.Order: 1 Kilogram

    FOB Price:  USD $ 0.0-0.0

    Our advantage:Our company was built in 2009 with an ISO certificate.In the past 5 years, we have grown up as a famous fine chemicals supplier in China and we had established stable business relationships with Samsung,LG,Merck,Thermo Fisher Scient

    Our company engages in Electronic chemicals such as OLED,Photoresist chemical,Electrolyte additive and Intermediate Pharmaceutical production; development of noble metal catalysts,

  •  Henan Tianfu Chemical Co., Ltd.

     China (Mainland)  |  Contact Details

    Business Type:Lab/Research institutions

    Tel:86-371-55170693/55170694

    Address:Zhengzhou International Trade New Territory,Jinshui District,Zhengzhou ,China

       Inquiry Now

  • Silicon

  • Casno:

    7440-21-3

    Silicon

    Min.Order: 0

    FOB Price:  USD $ 0.0-0.0

    SiliconAppearance:solid or liquid Storage:in sealed air resistant place Package:drum and bag Application:for pharma use Transportation:by sea or air

    Greenutra Resource is committed to the natural ingredients, formulation and application in the field of R&D, production and sales as the “one-step” natural product solution provide

  •  Greenutra Resource Inc

    China (Mainland)  |  Contact Details

    Business Type:Trading Company

    Tel:0086-411-39553357

    Address:No. 7-1-1802, Huizhi Garden,Ocean Square,Dalian, 116033, China

       Inquiry Now

  • Silicon

  • Casno:

    7440-21-3

    Silicon

    Min.Order: 0

    FOB Price:  USD $ 0.0-0.0

    high purity lowest priceAppearance:solid or liquid Storage:in sealed air resistant place Package:drum and bag Application:for pharma use Transportation:by sea or air Port:Beijing or Guangzhou

    Kono Chem Co.,Ltd is a leading producer of standardized herbal extracts, natural active ingredients and APIs for pharmaceutical, health food and cosmetic industries. Annually, mo

  •  Kono Chem Co.,Ltd

     China (Mainland)  |  Contact Details

    Business Type:Other

    Tel:86-29-86107037-8015

    Address:No.11 Daqing Road,Lianhu District,Xi’an 710082,China

       Inquiry Now

  • factory directly supply CAS  7440-21-3 with competitive price

  • Casno:

    7440-21-3

    factory directly supply CAS 7440-21-3 with competitive price

    Min.Order: 1 Kilogram

    FOB Price:  USD $ 112.0-112.0

    Product Description Description & Specification Category Pharmaceutical Raw Materials, Fine Chemicals, Bulk drug Standard Medical standard

    Zhuo Zhou Wen Xi Import and Export Co., Ltd. is a company mainly engaged in the export of pharmaceutical raw materials. Its parent company is (Wen Xi Pharma), including three subs

  •  Zhuozhou Wenxi import and Export Co., Ltd

     China (Mainland)  |  Contact Details

    Business Type:Trading Company

    Tel:+86-13111626072

    Address:Room 1710, Baoxin International Phase I, 19 Guanyun East Road, Zhuozhou, Hebei

       Inquiry Now

  • Silicon

  • Casno:

    7440-21-3

    Silicon

    Min.Order: 0

    FOB Price:  USD $ 0.0-0.0

    Ansciep Chemical is a professional enterprise manufacturing and distributing fine chemicals and speciality chemicals. We have been dedicated to heterocycle compounds and phenyl rings for tens of years. This is our mature product for export. Our quali

    Antimex Chemical Limied, was founded in 2001, we are specializing in manufacturing & researching of Active pharmaceutical Ingredients,Veterinary pharm APIs,cosmetic ingredients,and

  •  Antimex Chemical Limied

    China (Mainland)  |  Contact Details

    Business Type:Lab/Research institutions

    Tel:0086-21-50563169

    Address:Room1027,No.Jinyu Road,Pudong

       Inquiry Now

  • Silicon

  • Casno:

    7440-21-3

    Silicon

    Min.Order: 0

    FOB Price:  USD $ 0.0-0.0

    Ocean inorganic department is a professional supplier and exporter engaging in inorganic chemical materials and metal organic compounds. Over the past years, our company is committed to improving the product quality and developing new products, in or

    Hangzhou Ocean Chemical Co.ltd is a comprehensive chemical enterprise which mainly integrates R&D, production, marketing business of chemical in lab-pack, semi-bulk and bulk-quanti

  •  Hangzhou Ocean Chemical Co., Ltd.

    China (Mainland)  |  Contact Details

    Business Type:Lab/Research institutions

    Tel:+86-571-88025872, 28272092, 28272096

    Address:Room 623 ,Building No 1 , COFCO Radius Commercial Center Xiwen Road, Xiacheng District, Hangzhou, Zhejiang Province, China

       Inquiry Now

  • Silicon 99.99%

  • Casno:

    7440-21-3

    Silicon 99.99%

    Min.Order: 0

    FOB Price:  USD $ 0.0-0.0

    Amoychem is committed to providing the top-quality chemical products and services Internationally. We offer our customers with friendly, professional service and reliable, high performance products that have been manufactured according to the accredi

    Amoychem integrates the sourcing ,marketing and support of the entire range of top-quality chemical products. We provide our customers with professional service and high performan

  •  Xiamen AmoyChem Co.,Ltd

     China (Mainland)  |  Contact Details

    Business Type:Other

    Tel:+86 592 605 1114

    Address:Factory 2/F, NO. 206 Weili Road

       Inquiry Now

  • Silicon manufacture

  • Casno:

    7440-21-3

    Silicon manufacture

    Min.Order: 0

    FOB Price:  USD $ 0.0-0.0

    Hangzhou ZeErRui Chemical Co., Ltd. located in Lingang industrial areas, our plant covers an area of 6000 square meters.ZeErRui dedicated to the development, production and marketing of chemicals. We have earned ourselves a good reputation at home an

    Hangzhou ZeErRui Chemical Co., Ltd. located in Lingang industrial areas, our plant covers an area of 6000 square meters.ZeErRui dedicated to the development, production and marketi

  •  Hangzhou ZeErRui Chemical Co., Ltd.

    China (Mainland)  |  Contact Details

    Business Type:Lab/Research institutions

    Tel:+86-571-82512721

    Address:No 317,Jingling Road,Guali Town,Xiaoshan District

       Inquiry Now

  • Silicon

  • Casno:

    7440-21-3

    Silicon

    Min.Order: 0

    FOB Price:  USD $ 0.0-0.0

    Professional Intermediates Supplier Application:Intermediates

    T&W GROUP was established in 2007, headquartered in Shanghai, China. By integrating people, technology and potential, we endeavor to work for a better life. We are in the business

  •  SHANGHAI T&W PHARMACEUTICAL CO., LTD.

     China (Mainland)  |  Contact Details

    Business Type:Lab/Research institutions

    Tel:+86-21-61551611

    Address:601, No. 1, 2277 Nong, Zu Chongzhi Road, Zhangjiang Hightech. Park, Pudong

       Inquiry Now

  • silicon atom/silicon powder/Nano-grade silicon atom 7440-21-3

  • Casno:

    7440-21-3

    silicon atom/silicon powder/Nano-grade silicon atom 7440-21-3

    Min.Order: 0

    FOB Price:  USD $ 0.0-0.0

    silicon atom/silicon powder/Nano-grade silicon atom 7440-21-3Appearance:gray powder Storage:Normal temperature, sealed, cool, ventilated and dry environment Package:according to the clients requirement Application:Metal powder Transportation:By expre

    Hunan Runhui Chem Co., Ltd. is a comprehensive Fine chemicals and Pharmaceuticals Intermediates supplier in China , Established in Changsha City of Hunan province registered capit

  •  Hunan Longxianng Runhui Trading Co.,Ltd

     China (Mainland)  |  Contact Details

    Business Type:Lab/Research institutions

    Tel:86-731-85570686

    Address:29 Floor,Changsheng Upper Strata,Furong District,China

       Inquiry Now

  • Silicon powder

  • Casno:

    7440-21-3

    Silicon powder

    Min.Order: 0

    FOB Price:  USD $ 0.0-0.0

    in store Package:1kg Application:Organic Chemicals

    We are engaged in the research and development of active pharmaceutical ingredients, the manufacture of pharmaceutical intermediates and the production of a variety of organic fine

  •  HWRK Chem

     China (Mainland)  |  Contact Details

    Business Type:Trading Company

    Tel:86-21-51691807

    Address:shanghai

       Inquiry Now

  • Amadis Chemical offer CAS#7440-21-3;CAT#A851427

  • Casno:

    7440-21-3

    Amadis Chemical offer CAS#7440-21-3;CAT#A851427

    Min.Order: 10 Milligram

    FOB Price:  USD $ 0.0-0.0

    1.Professional synthesis laboratory and production base. 2.Strong synthesis team and service team. 3.Professional data management system. 4.We provide the professional test date and product information ,ex. HNMR ,CNMR,FNMR, HPLC/G

    Founded in 2011, Amadis Chemical Company Limited is an innovative manufacturer of chemical products and technical service providers. Our business includes sales, manufacture, and s

  • Amadis Chemical Co., Ltd.

     China (Mainland)  |  Contact Details

    Business Type:Lab/Research institutions

    Tel:86-571-89925085

    Address:Watts Cosine.No.166.Xiangmao Road.

       Inquiry Now

  • Silicon

  • Casno:

    7440-21-3

    Silicon

    Min.Order: 1 Kilogram

    FOB Price:  USD $ 0.0-0.0

    Henan Sunlake Enterprise Corporation is located in Henan Province , the central plain of China , which enjoys favorable geogeaphical position and convenient transportion. The compa

  • HENAN SUNLAKE ENTERPRISE CORPORATION

     China (Mainland)  |  Contact Details

    Business Type:Trading Company

    Tel:+86-371- 86259723

    Address:Mingmen International Center, NO.222 Dongming Road,Zhengzhou,Henan,China

       Inquiry Now

  • Silicon in stock factory

  • Casno:

    7440-21-3

    MSDS/COA Download

    Silicon in stock factory

    Min.Order: 1 Kilogram

    FOB Price:  USD $ 0.0-0.0

    Known for its best quality and competitve price, this chemicals we offered is widely appreciated by our customers. Our advantages: 1, High quality with competitive price: 1) Standard:BP/USP/EP/Enterprise standard 2) All Purity≥99% 3) We

    Shaanxi Mingqi Chemical Co., Ltd is committed to the development of import and export trade in the production, operation and plant extracts of pharmaceutical raw materials and inte

  • Shaanxi Mingqi Chemical Co., Ltd

     China (Mainland)  |  Contact Details

    Business Type:Lab/Research institutions

    Tel:+8618092428356

    Address:Weiyang District

       Inquiry Now

  • 98%-99.9% Silicon 7440-21-3

  • Casno:

    7440-21-3

    98%-99.9% Silicon 7440-21-3

    Min.Order: 1 Metric Ton

    FOB Price:  USD $ 1650.0-1650.0

    Description Silicon Metal processed by excellent industrial silicon and including full varieties. Used in electro, metallurgy and chemical industry. It is silver gray or dark gray powder with metallic luster, which be of high melting point,

    Xi'an Galaxy Chemicals Group established in 2001, we are a manufacturer to produce the Surfactants and Solvents. And also we have a fixed supply chain to provide and agent others r

  • Xi'an Galaxy Chemicals CO., Ltd

    China (Mainland)  |  Contact Details

    Business Type:Trading Company

    Tel:86-29-89380370

    Address:No.8, Gaoxin three road, Xi'an city.

       Inquiry Now

  • Nettle Extract Nettle Plant Extract Nettle Root Extract

  • Casno:

    7440-21-3

    MSDS/COA Download

    Nettle Extract Nettle Plant Extract Nettle Root Extract

    Min.Order: 5 Kilogram

    FOB Price:  USD $ 0.0-0.0

    1.Best quality 2.Competitive price 3.Fast Delivery 4.Excellent service. 5.Free sample(10-20g or enough to detection) and Unconditional assume response 6.Packaging: 1kg with double plastic container inside/Aluminum foil bag outside 25 kg with

    Shaanxi Sinuote Biotech Co., Ltd. Was established in 2007. We is an exporter of China (Mainland) Plant Extract products. Our products have been sold well in North America South A

  • Shaanxi Sinuote Biotech Co.,Ltd

    China (Mainland)  |  Contact Details

    Business Type:Trading Company

    Tel:+86-29-68859685

    Address:No 18,Taiyuan Road ,Xi'an city ,China

       Inquiry Now

  • silicon atom price Buy 7440-21-3

  • Casno:

    7440-21-3

    silicon atom price Buy 7440-21-3

    Min.Order: 1 Gram

    FOB Price:  USD $ 0.0-0.0

    Our Services 1.TOP 10 Chemical enterprises in China 2.Over 10 years of experience 3.Wholly owned production plant (12002) 4.Sales to more than 120 countries 5.200 products with competitive price

    Founded in 2002, Hubei Norna Technology Co., Ltd. is a subsidiary of Nona Group. The company specializes in the research, development, production and sales of pharmaceutical interm

  • Hubei Norna Technology Co., Ltd.

    China (Mainland)  |  Contact Details

    Business Type:Trading Company

    Tel:86-173-86169806

    Address:Hubei Wuhan Economic and technological Development Zone

       Inquiry Now

  • National Research Platform  ISO 9001  7440-21-3

  • Casno:

    7440-21-3

    National Research Platform ISO 9001 7440-21-3

    Min.Order: 0

    FOB Price:  USD $ 0.0-0.0

    Zhengzhou Kingorgchem Chemical Technology Co., Ltd. was founded on the basis of Organophosphorus Chemistry Lab of Institute of Chemistry Henan Academy of Sciences in 2015. The laboratory covers 600 m2 and the pilot plant covers 2000 m2. Kingorgchem i

    Zhengzhou Kingorgchem Chemical Technology Co., Ltd. was founded on the basis of Organophosphorus Chemistry Lab of Institute of Chemistry Henan Academy of Sciences in 2015. The

  • Zhengzhou Kingorgchem Chemical Technology Co., Ltd.

     China (Mainland)  |  Contact Details

    Business Type:Lab/Research institutions

    Tel:+86-371-65511936

    Address:NO.56,Hongzhuan Road

       Inquiry Now

  • Silicon

  • Casno:

    7440-21-3

    Silicon

    Min.Order: 1 Gram

    FOB Price:  USD $ 0.0-0.0

    Watson International Ltd' has a very strong R&D and technical capacity supported by FCAD's platform. The subsidiaries under FCAD Group have accumulated much know-how of different fine chemical branches. For example, Apnoke Scientific L

    Watson International Ltd is the business department of FCAD Group. FCAD helps clients from different fields to develop their required fine chemicals or formulations. From pharmaceu

  • Watson International Ltd

    United Kingdom  |  Contact Details

    Business Type:Lab/Research institutions

    Tel:+44 (0)2036089360-31

    Address:Chanceryhouse,Chancery Lan

       Inquiry Now

  • Silicon

  • Casno:

    7440-21-3

    Silicon

    Min.Order: 0

    FOB Price:  USD $ 0.0-0.0

    We have strong R&D center which can support and provide custom synthesis accordingly such as fine chemicals,biotechnique , pharmaceuticals etc.We can provide free sample for our clients to test anf verify the quality of our goods.LongyuChem holds str

    Shanghai Longyu biotech Co., Ltd. is a large-scale modern chemical production enterprise dedicated to the production, research and development and sales of chemical products. It co

  • shanghai Longyu biotechnology Co.,Ltd

     China (Mainland)  |  Contact Details

    Business Type:Lab/Research institutions

    Tel:86-15821988213

    Address:Dalian Rd 950th

       Inquiry Now

  • Silicon lump

  • Casno:

    7440-21-3

    Silicon lump

    Min.Order: 10 Gram

    FOB Price:  USD $ 0.9-1.2

    Hebei ruishun trade co.,ltd, registered capital one million,have a production of pharmaceutical raw materials, pharmaceutical raw materials factory reagent r&d center,seek development by credit reputation.our products have a large price advanta

    Hebei Ruishun Trade Co.,Ltd registered capital one million, we have a production of pharmaceutical raw materials, pharmaceutical raw materials factory reagent r&d center, we do

  • Hebei Ruishun Trade Co.,Ltd

    China (Mainland)  |  Contact Details

    Business Type:Trading Company

    Tel:+86-311-68037669

    Address:WanDa commerce building ,yuhua district

       Inquiry Now

  • High quality Silicon 99.99%

  • Casno:

    7440-21-3

    High quality Silicon 99.99%

    Min.Order: 1 Kilogram

    FOB Price:  USD $ 0.0-0.0

    BaiFuChem is a Professional chemical raw material supplier in China, our main products include Biochemical , Pharma Intermediate and Organic chemical etc. BaiFuChem have wealth of products,experience , expertise and state-of-the-art

    BaiFuChem is a Professional chemical raw material supplier in China, our main products include Biochemical , Pharma Intermediate and Organic chemical etc. BaiFuChem have wea

  • Xiamen BaiFuchem Co.,Ltd

     China (Mainland)  |  Contact Details

    Business Type:Other

    Tel:+86 592 605 6448

    Address:No.31 Pingshan Nanli, Haicang Industrial Park, Xiamen, China

       Inquiry Now

  • Silicon Metal Powder

  • Casno:

    7440-21-3

    Silicon Metal Powder

    Min.Order: 1 Metric Ton

    FOB Price:  USD $ 0.0-0.0

    Appearance:Grey and metallic color Storage:Storage at ventilate and dry place and prevention from water, heat and fire Package:Net weight 25kg/woven bag, 30 woven bags in one ton bag, net weight 750 kg/ton bag Application: It is widely used in the ar

    Established in 2005, Zhejiang Hoshine Silicon Industry Co., Ltd. is a subsidiary of Ningbo Hesheng Group. Located in the "New Material Industry Park" of Jiaxing Harbor Di

  • Zhejiang Hoshine Silicon Industry Co., Ltd.

    China (Mainland)  |  Contact Details

    Business Type:Manufacturers

    Tel:86-573-89179966

    Address:Zhapu Town, Pinghu City, Zhejiang, China

       Inquiry Now

Post a RFQ

Enter 15 to 2000 letters.Word count: 0 letters

Attach files(File Format: Jpeg, Jpg, Gif, Png, PDF, PPT, Zip, Rar,Word or Excel Maximum File Size: 3MB)

1

What can I do for you?
Get Best Price

Get Best Price for 7440-21-3

History

 Silicon was first identified by Antoine Lavoisier in 1787 (as a component of the Latin silex, silicis for flint, flints), and was later mistaken by Humphry Davy in 1800 for a compound. In 1811 Gay-Lussac and Thénard probably prepared impure amorphous silicon through the heating of potassium with silicon tetrafluoride. In 1824, Berzelius, generally given creditwhere for discovering the element silicon, prepared amorphous silicon using approximately the same method as Lussac. Berzelius also purified the product by repeatedly washing it.

Consensus Reports

Reported in EPA TSCA Inventory.

Standards and Recommendations

OSHA PEL: TWA Total Dust: 10 mg/m3 of total; Respirable Fraction: 5 mg/m3
ACGIH TLV: TWA (nuisance particulate) 10 mg/m3 of total dust (when toxic impurities are not present, e.g., quartz <1%)
DOT Classification:  4.1; Label: Flammable Solid

Specification

With the CAS registry number 7440-21-3, Silicon is also named as Polyeristalline silicon powder. The product's categories are Inorganics; Silicon Nanomaterials; 14: Si; Nanoparticles: Metals and Metal AlloysMetal and Ceramic Science; Nanopowders and Nanoparticle Dispersions; Pure ElementsMetal and Ceramic Science; Electronic Chemicals; Materials Science. Besides, it is grey lustrous solid or grey powder, which should be stored in a cool, dry, ventilated warehouse away from fire and heat source. It is stable and incompatible with oxidizing agents, bases, carbonates, alkali metals, lead and aluminium oxides, halogens, carbides, formic acid. In addition, its molecular formula is Si and molecular weight is 28.08.

The other characteristics of this product can be summarized as: (1)Exact Mass: 27.976927; (2)MonoIsotopic Mass: 27.976927; (3)EINECS: 231-130-8; (4)Density: 2.33 g/cm3; (5)Melting point: 1410 °C; (6)Boiling point: 2355 °C; (7)Enthalpy of Vaporization: 15.08 kJ/mol; (8)Vapour Pressure: 54300 mmHg at 25 °C.

Preparation of Silicon: this chemical is commercially prepared by the reaction of high-purity silica with wood, charcoal, and coal, in an electric arc furnace using carbon electrodes.This reaction will occur at temperature of 1900 °C. The chemical equations is as follows:
SiO2 + C → Si + CO2
SiO2 + 2 C → Si + 2 CO
The yield is at least 98 % pure.

Uses of Silicon: this chemical is mainly used for the manufacture of aluminium-silicon alloys to produce cast parts in the automotive industry. It is also used in the semiconductor industry, electronics and photovoltaic applications to produce ultra-pure silicon wafers. Similarly, it can be used in waterproofing treatments, molding compounds and mold-release agents, mechanical seals, high temperature greases and waxes, caulking compounds and even in applications as diverse as breast implants, contact lenses, explosives and pyrotechnics.

When you are using this chemical, please be cautious about it as the following: it is highly flammable. Please keep container tightly closed in a well-ventilated place away from sources of ignition. And in case of contact with eyes, rinse immediately with plenty of water and seek medical advice. Moreover, you should wear suitable protective clothing and gloves. And please take precautionary measures against static discharges. Additionally, in case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)

You can still convert the following datas into molecular structure:
(1)SMILES: [SiH4]
(2)InChI: InChI=1/Si
(3)InChIKey: XUIMIQQOPSSXEZ-UHFFFAOYAB
(4)Std. InChI: InChI=1S/Si
(5)Std. InChIKey: XUIMIQQOPSSXEZ-UHFFFAOYSA-N

The toxicity data is as follows:

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
rat LD50 oral 3160mg/kg (3160mg/kg)   FAO Nutrition Meetings Report Series. Vol. 53A, Pg. 21, 1974.
rat LDLo intraperitoneal 500mg/kg (500mg/kg) SENSE ORGANS AND SPECIAL SENSES: OTHER: EYE

LUNGS, THORAX, OR RESPIRATION: RESPIRATORY STIMULATION

SENSE ORGANS AND SPECIAL SENSES: OTHER CHANGES: OLFACTION
National Technical Information Service. Vol. OTS0536164,