Ammonium dichromate

Base Information

• Chemical Name: Ammonium dichromate
• CAS No.: 7789-09-5
• Molecular Formula: Cr2H8N2O7
• Molecular Weight: 252.06
• Hs Code.: 28415000
• European Community (EC) Number: 232-143-1
• ICSC Number: 1368
• UN Number: 1439
• UNII: 5J18BP595G
• DSSTox Substance ID: DTXSID70872953
• Wikipedia: Ammonium dichromate,Ammonium_dichromate
• Wikidata: Q422430
• Mol file: 7789-09-5.mol

Synonyms:ammonium bichromate;ammonium dichromate

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Chemical Property of Ammonium dichromate

Chemical Property:

• Appearance/Colour: bright orange-red crystals
• Melting Point: 170 °C (dec.)(lit.)
• PSA: 124.45000
• Density: 2.150 g/cm³
• LogP: -0.24940
• Solubility.: H2O: 1 M at 20 °C, clear, colorless
• Water Solubility.: 360 g/L (20 ºC)
• Hydrogen Bond Donor Count: 2
• Hydrogen Bond Acceptor Count: 7
• Rotatable Bond Count: 0
• Exact Mass: 251.914160
• Heavy Atom Count: 11
• Complexity: 194
• Transport DOT Label: Oxidizer

Purity/Quality:

Safty Information:

• Pictogram(s): E,T+,N
• Hazard Codes: E,T+,N
• Statements: 45-46-60-61-2-8-21-25-26-34-42/43-48/23-50/53
• Safety Statements: 53-45-60-61

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Chemical Classes: Metals -> Chromium Compounds, Inorganic
• Canonical SMILES: [NH4+].[NH4+].[O-][Cr](=O)(=O)O[Cr](=O)(=O)[O-]
• Inhalation Risk: A harmful concentration of airborne particles can be reached quickly when dispersed.
• Effects of Short Term Exposure: The substance is corrosive to the eyes, skin and respiratory tract. Corrosive on ingestion. The substance may cause effects on the kidneys and liver. This may result in tissue lesions.
• Effects of Long Term Exposure: Repeated or prolonged contact may cause skin sensitization. Repeated or prolonged inhalation may cause asthma. Repeated or prolonged inhalation may cause nasal ulceration. This may result in perforation of the nasal septum. The substance may have effects on the kidneys. This may result in kidney impairment. This substance is carcinogenic to humans. Animal tests show that this substance possibly causes toxicity to human reproduction or development.
• Description: Ammonium dichromate is a salt consisting of ammonium ions and dichromate ions. It can be used as in pyrotechinics, photography as well as lithography. It can be used as a catalyst and a source of pure nitrogen in the laboratory. It can also be used as the mordant of dyeing pigment. It has application in the manufacturing of alizarin, chrome alum, leather tanning and oil purification. Moreover, it can be used for the production of phosphor raster of television screen through acting as the photoactive site. Finally, there are also reports using it for combustion synthesis of perovskite LnCrO3 powder and oxidation of hydroquinones, catechols and phenols.
• Uses: Ammonium dichromate is used in photo engraving, dye mordant, pigments, pickling, photography, process engraving, lithography, pyrotechnics, glazes for porcelain and china wares. It acts as a catalyst and a source of nitrogen in the laboratory and as the photoactive site. It is also used in the preparation of alizarin and chrome alum. Further, it is used in leather and oil industry for tanning and purification respectively. It is involved in the production of the phosphor raster television screens and other devices. It is used in oxidimetric standard. Source of pure nitrogen (esp in the laboratory); in pyrotechnics (Vesuvius fire); in lithography and photo engraving; in special mordant, catalysts, and porcelain finishes; intermediate in the manufacture of pigments; of magnetic recording materials. Yellow needles made by chromic acid acting on ammonium hydroxide. The product is produced by crystallization. Ammonium dichromate was used interchangeably with potassium dichromate for sensitizing gelatin, albumen, gums, and other colloids that were used for pigment processes. Ammonium dichromate is more sensitive than the potassium alternative.