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Chemicals Under Consideration for Toxicity Factor Development

The page contains chemicals under consideration for toxicity factor development by the TCEQ Toxicology Division along with toxicity data requests for those chemicals.
Toxicity Data Request

NEWThe Toxicology Division is requesting toxicity data (this is an updated request) for consideration in the development of toxicity factors for the following chemicals through October 16, 2020:

Chemical CAS Number
Beryllium and beryllium compounds 7440-41-7 (Be)
Tert-butyl alcohol 75-65-0
Ethyl tert-butyl ether 637-92-3
Methyl isobutyl ketone 108-10-1
Acrylic acid 79-10-7

How To Submit Data:

e-mail: or mail to:

Regular mail:

Toxicology Division, MC 168

Texas Commission on Environmental Quality

P.O. Box 13087

Austin, TX 78711-3087

Mail delivery services:

Toxicology Division, MC 168

Texas Commission on Environmental Quality

12100 Park 35 Circle, Bldg. F

Austin, TX 78753

Contact the TCEQ About DSDs and Fact Sheets

Call:      877-992-8370 (toll free) or 512-239-1795


Write:   Texas Commission on Environmental Quality
            Toxicology, Risk Assessment, and Research Division, MC 168
            P.O. Box 13087 
            Austin, TX 78711-3087

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