Cobalt and Cobalt Compounds
CASRN 1307-96-6
IRIS Assessment Plan and Protocol for Assessing Cancer Risk from Inhalation Exposure to Cobalt and Cobalt Compounds (Scoping and Problem Formulation Materials)
Notice
Overview
Citation
U.S. EPA. IRIS Assessment Plan and Protocol for Assessing Cancer Risk from Inhalation Exposure to Cobalt and Cobalt Compounds (Scoping and Problem Formulation Materials). U.S. Environmental Protection Agency, Washington, DC, EPA/635/R-22/248, 2022.
Background
Cobalt is a metallic element that is naturally occurring as several different substances and oxidation states, often in association with nickel, silver, lead, copper, and iron ores. Cobalt compounds represent a large group of substances and are used in a variety of industrial applications including as a colorant for glass, ceramics, and paint; as driers for inks and paints; as catalysts; and in feed supplements and batteries. Cobalt is also used in alloys or composites. The cancer assessment of water-soluble and water-insoluble cobalt compounds is focused on inhalation exposure from emissions to air during industrial processes and those cobalt forms most pertinent to implementing the Clean Air Act (CAA).
History/Chronology
Date | Description |
---|---|
Nov 2022 | EPA released the draft IRIS Assessment Plan and Protocol for Assessing Cancer Risk from Inhalation Exposure to Cobalt and Cobalt Compounds for a 30-day public comment and review period. [Federal Register Notice Nov 14, 2022] |
Download(s)
This download(s) is distributed solely for the purpose of pre-dissemination peer review under applicable information quality guidelines. It has not been formally disseminated by EPA. It does not represent and should not be construed to represent any Agency determination or policy.
- IRIS Assessment Plan and Protocol for Assessing Cancer Risk from Inhalation Exposure to Cobalt and Cobalt Compounds (PDF) (88 pp, 2 MB, about PDF)
- IRIS Public Science Meeting on Cobalt and Cobalt Compounds (Jan 2023)
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Federal Register Notices
Docket
Comments on the assessment may be submitted and reviewed using the Docket ID EPA-HQ-ORD-2022-0833