| [Fire Fighting] Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam. | |
| [Ingestion] If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid. | |
| [Inhalation] Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid. | |
| [Skin] Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. | |
| [Eyes] Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. | |
| [Storage] Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. | |
| [Handling] Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. | |
| [Ingestion] The toxicological properties of this substance have not been fully investigated. | |
| [Inhalation] The toxicological properties of this substance have not been fully investigated. Inhalation of dust may cause respiratory tract irritation. | |
| [Skin] No information regarding skin irritation and other potential effects was found. | |
| [Eyes] No information regarding eye irritation and other potential effects was found. | |
| [Personal Protection] Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure. | |
| [Respirators] Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary. | |
| [Appearance] Off-white solid. | |
| [Solubility in water] Very soluble | |
| [Melting Point] 227 | |
| [Boiling Point] 429 | |
| [pKa/pKb] 1.7 (pKa) | |
| [Partition Coefficient] -1.38 | |
| [Product Name] DL-Cystine | |
| [Synonyms] 2-Amino-3-(2-amino-3-hydroxy-3-oxopropyl)disulfanylpropanoic acid | |
| [CAS] "CASEN_923-32-0.htm">923-32-0 | |
| [Formula] C6H12N2O4S2 | |
| [Molecular Weight] 240.29 | |
| [EINECS] 213-094-5 | |
| [Merck] 13,2811 | |
| [Beilstein/Gmelin] 1728095 | |
| [Beilstein Reference] 4-04-00-03156 | |
| [Small spills/leaks] Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. | |
| [Incompatibilities] Oxidizing agents | |
| [Stability] Stable under normal temperatures and pressures. | |
| [Decomposition] Nitrogen oxides, carbon monoxide, oxides of sulfur, carbon dioxide. |
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