Skip to Main Navigation
Skip to Page Content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Testing Status of Asbestos, chrysotile(SR) 11331-N

 

CASRN: 12001-29-5

Formula: H4-O4-Si.1/2H2-O.1/2Mg

Synonyms/Common Names

  • Asbestos, chrysotile

Known Uses

Asbestos, chrysotile: asbestos cement. Textiles. Insulation. Friction products. Fireproofing agent. Associated with tobacco: reported either as a natural component of tobacco, pyrolysis product (in tobacco smoke), or additive for one or more types of tobacco products.

Chemical Properties

Toxicity Effects (HSDB)

Long-Term Carcinogenicity

  • 2-Year (Dosed-Feed)  (C61223A)  Completed 
    • TR-295 (NIH Number: 86-2551)  (Peer Review Approval 07/27/1984A )
      Toxicology and Carcinogenesis Studies of Chrysotile Asbestos (CASRN 12001-29-5) in F344/N Rats (Feed Studies)
    • Rats: F344/N
    • Carcinogenesis Results
      • Male Rats No Evidence 
      • Female Rats No Evidence 
    • Dose: 0, 1 %/250 PER GROUP.
  • 2-Year (Dosed-Feed)  (C61223B)  Completed 
    • TR-246 (NIH Number: 90-2502)  (Peer Review Approval 06/23/1981A )
      Lifetime Carcinogenesis Studies of Chrysotile Asbestos (CASRN 12001-29-5) in Syrian Golden Hamsters (Feed Studies)
    • Hamsters: Syrian Golden
    • Carcinogenesis Results
      • Male Hamsters Negative 
      • Female Hamsters Negative 
    • Dose: 0, 1 %/60 PER GROUP.