Data on antimony trioxide use, exposure and toxicity is being sought by the National Toxicology Program as it prepares to evaluate the carcinogenicity of the mineral.
In a Federal Register notice, the toxicology program seeks the submission of such data as it prepares to review antimony trioxide (CAS No. 1309-64-4) for possible inclusion in the Report on Carcinogens.
That report lists chemicals, viruses and other substances that are known or reasonably anticipated to cause cancer in people. Inclusion in the report is not a regulatory action, but it can trigger hazard warnings or other regulatory requirements.
Antimony trioxide’s primary...