National Toxicology Program

National Toxicology Program

Testing Status of Asbestos, crocidolite - 10757-N


CASRN: 12001-28-4

Formula: O-Na2Fe2-O33Fe-O8Si-O2H2-O

Synonyms/Common Names

  • Asbestos, crocidolite
  • Crocidolite asbestos

Known Uses

Cement pipe

Chemical Properties

Toxicity Effects (HSDB)

Nomination Background

Long-Term Carcinogenicity

  • 2-Year (Dosed-Feed)  (C09007)  Report Complete 
    • TR-280 (NIH Number: 89-2536)  (Peer Review Approval 02/28/1983A )
      Toxicology and Carcinogenesis Studies of Crocidolite Asbestos (CASRN 12001-28-4) In F344/N Rats (Feed Studies)
    • Rats: F344/N
    • Carcinogenesis Results
      • Male Rats Negative 
      • Female Rats Negative 
NTP is located at the National Institute of Environmental Health Sciences, part of the National Institutes of Health.