DL-Cystine CAS 923-32-0

1. DL-Cystine is a chemical used in the preparation of sulfur-containing dimeric and monomeric surfactants .
2. DL-Cystine CAS 923-32-0 is identified as a metabolic intermediate that can provide electrons and play a critical role in promoting elemental sulfur-mediated sulfur autotrophic denitrification processes for nitrate removal from aquatic environments .
3. DL-Cystine serves as a source of carbon, nitrogen, and sulfur in biochemical research, such as studying the metabolic pathways of microorganisms .

1. Store DL-Cystine in a tightly sealed container in a cool, dry, and well-ventilated place . For long-term storage of the powder, keep it at -20°C . For solutions in solvent, store at -80°C .
2. Keep DL-Cystine CAS 923-32-0 away from strong oxidizing agents, strong acids, and strong alkalis due to incompatibility .
3. Handle DL-Cystine using appropriate personal protective equipment including gloves and safety goggles, as it is harmful if swallowed (H302) and may cause skin and eye irritation (H315, H319) .

1. Isolate the spill area, wear full protective equipment including a suitable respirator, and avoid dust generation when handling solid DL-Cystine .
2. Sweep up the spilled solid into sealed, labeled containers for disposal. Absorb solutions with inert material like diatomite, and decontaminate surfaces by scrubbing with alcohol .
3. Prevent DL-Cystine CAS 923-32-0 from entering drains or waterways, as it is very toxic to aquatic life with long-lasting effects (H410). Collect spillage (P391) and dispose of waste according to local environmental regulations .

1. DL-Cystine is classified with GHS signal word "Warning" . It is harmful if swallowed (H302) and may cause skin and serious eye irritation (H315, H319) . It may also cause respiratory irritation (H335) .
2. DL-Cystine CAS 923-32-0 is very toxic to aquatic life with long-lasting effects (H410) . Avoid release to the environment (P273) .
3. DL-Cystine has a melting point of 227°C . It is stable under recommended storage conditions. Under fire conditions, thermal decomposition produces toxic fumes including carbon oxides, nitrogen oxides, and sulfur oxides . It is not classified as hazardous for transport by DOT, IATA, or IMDG .