Ochratoxin A

**Semantic type:** Hazardous or Poisonous Substance

**Definition:** A white, crystalline powder that is very unstable in the presence of light but fairly heat resistant. Ochratoxin A is a widespread, naturally occurring mycotoxin that is produced by some fungi, especially by Aspergillus and Penicillium, and is a very common food contaminant found on grains, coffee beans, nuts, decaying vegetation, moldy cereals and animal feeds. This toxin is used in research as an experimental teratogen and carcinogen. Ochratoxin A is reasonably anticipated to be a human carcinogen and may be associated with an increased risk of developing urinary tract tumors. (NCI05)

**Synonyms:** - (R)-N-[(5-chloro-3,4-dihydro-8-hydroxy-3-methyl-1-oxo-1H-2-benzopyran-7-yl)carbonyl]-L-phenylalanine - Antibiotic 9663 - OCHRATOXIN A - OTA