National Toxicology Program

(CAS# 56-75-7)

• Primary Uses or Exposures: Chloramphenicol has been used as an antibiotic since the 1950s but currently has restricted use in the United States because it causes blood dyscrasia.
• Nominated by: NIEHS
• Basis for Nomination: IARC¹ classification as probably carcinogenic to humans based on finding of limited evidence of carcinogenicity in human epidemiology studies
• Current Status: Listed in the RoC as reasonably anticipated to be a human carcinogen since the 10th RoC (2002)

¹ International Agency For Research On Cancer (IARC)