CAS No.:923-32-0

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. 

Consensus Reports：DL-cystine is reported in EPA TSCA Inventory.
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