Anthophyllite Asbestos — Reference

What Anthophyllite Is

Anthophyllite is the rarest of the six regulated asbestos minerals — a magnesium-iron silicate amphibole that crystallizes in straight, brittle, gray-to-brown fibers. It has been mined commercially on a much smaller scale than chrysotile, amosite, or crocidolite, with the principal historical sources in Finland (Paakkila mine) and on a smaller scale in the eastern United States (North Carolina, Georgia).

Where Anthophyllite Was Used

Anthophyllite saw limited specialty commercial use in:

  • Talc-deposit contamination — many North American talc deposits contain anthophyllite as a natural contaminant alongside tremolite-actinolite (see Talc Products)
  • Specialty insulation and filler products — particularly in the early- to mid-twentieth century
  • Asbestos-cement and friction products — minor formulations

The mineral never achieved the commercial-product scale of the three major asbestos types but is significant in U.S. public-health analysis because of its contamination of domestic talc and its presence in certain regional geological deposits.

Regulatory Classification

OSHA, EPA, NIOSH, IARC, and WHO classify anthophyllite as a Group 1 (definite) human carcinogen alongside the other asbestos minerals. The standard regulatory framework treats all six regulated asbestos varieties (chrysotile, amosite, crocidolite, tremolite, actinolite, anthophyllite) as known human carcinogens without exemption.

Cross-References

Compiled from EPA, OSHA, NIOSH, IARC, and WHO public health classifications, USGS mineral-commodity records, and academic mineralogy references. Not legal advice; consult a licensed attorney about your specific situation.