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About the Chemicals Under Consideration for Toxicity Factor Development

The Toxicology Division sends list serve announcements and encourages interested parties to submit relevant technical data.

NEW The 4,4-Methylene Diphenyl Diisocyanate and 1,6-Hexamethylene Diisocyanate DSD has been finalized

Chemicals are selected for one or more of the following reasons:
  • they have been detected in air monitoring
  • permits are frequently issued for them
  • the public has expressed concerns about them
The Toxicology Division is not requesting toxicity information at this time. Members on the Toxicology Announcement List will be informed when there is a request for information.
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Instructions on how to join the Toxicology Announcement List.