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Cas Database |
| Name |
DL-cystine |
EINECS | 213-094-5 |
| CAS No. | 923-32-0 | Density | 1.571 g/cm3 |
| PSA | 177.24000 | LogP | 0.59220 |
| Solubility | Soluble in dilute acid and alkali solution, highly soluble in water, not soluble in alcohol. | Melting Point |
227 °C (dec.)(lit.) |
| Formula | C6H12N2O4S2 | Boiling Point | 468.2 °C at 760 mmHg |
| Molecular Weight | 240.304 | Flash Point | 237 °C |
| Transport Information | N/A | Appearance | white to off-white powder |
| Safety | 37/39-26-24/25-36 | Risk Codes | 36/37/38-22 |
| Molecular Structure |
|
Hazard Symbols |
 Xn, Xi
|
| Synonyms |
Cystine,DL- (8CI);CCRIS 8599;NSC 203781; |
Article Data | 105 |
DL-cystine Chemical Properties
MF: C6H12N2O4S2
MW: 240.3
EINECS: 213-094-5
mp： 227 °C (dec.)(lit.)
Merck： 2782
CAS DataBase Reference： 923-32-0(CAS DataBase Reference)
NIST Chemistry Reference： 923-32-0(NIST)
The structure of DL-cystine is :
DL-cystine Toxicity Data With Reference
1、RTECS#: CAS# 923-32-0: None listed
2、LD50/LC50: RTECS: Not available.
3、Carcinogenicity: DL-Cystine - Not listed as a carcinogen by ACGIH, IARC, NTP, or CA Prop 65.
4、Other: See actual entry in RTECS for complete information. The toxicological properties have not been fully investigated.
2、LD50/LC50: RTECS: Not available.
3、Carcinogenicity: DL-Cystine - Not listed as a carcinogen by ACGIH, IARC, NTP, or CA Prop 65.
4、Other: See actual entry in RTECS for complete information. The toxicological properties have not been fully investigated.
DL-cystine Consensus Reports
DL-cystine is reported in EPA TSCA Inventory.
DL-cystine Safety Profile
Hazard Codes： Xn,Xi
WGK Germany： 3
Risk Statements： Irritating to the eyes；Irritating to the respiratory system；Irritating to the skin
Safety Statements： Wear suitable protective clothing, gloves and eye/face protection；Avoid contact with skin and eyes；In case of contact with eyes, rinse immediately with plenty of WATER and seek medical advice
WGK Germany： 3
Risk Statements： Irritating to the eyes；Irritating to the respiratory system；Irritating to the skin
Safety Statements： Wear suitable protective clothing, gloves and eye/face protection；Avoid contact with skin and eyes；In case of contact with eyes, rinse immediately with plenty of WATER and seek medical advice
DL-cystine Specification
1、First Aid Measures
Eyes: Flush eyes with plenty of WATER for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
Skin: Get medical aid. Flush skin with plenty of WATER for at least 15 minutes while removing contaminated clothing and shoes.
Ingestion: Get medical aid. Wash mouth out with WATER.
Inhalation: Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
Notes to Physician: Treat symptomatically and supportively.
2、Handling and Storage
Handling: Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes. Avoid ingestion and inhalation.
Storage: Store in a cool, dry place. Store in a tightly closed container.
Eyes: Flush eyes with plenty of WATER for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
Skin: Get medical aid. Flush skin with plenty of WATER for at least 15 minutes while removing contaminated clothing and shoes.
Ingestion: Get medical aid. Wash mouth out with WATER.
Inhalation: Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
Notes to Physician: Treat symptomatically and supportively.
2、Handling and Storage
Handling: Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes. Avoid ingestion and inhalation.
Storage: Store in a cool, dry place. Store in a tightly closed container.
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DL-Cystine
