Regulated Substance

Highly Hazardous Substance Information

If a facility uses, stores, produces or otherwise handles any highly hazardous substance in excess of the listed threshold quantity, they are likely subject to the provisions of CAPP. A list of the substances can be accessed by clicking on one of the following links:

Substance Data Forms

Chemical-specific data forms have been developed for numerous highly hazardous substances (see links below for avaiable forms). These are intended to provide a quick reference to select physical properties, toxicity information, and regulatory information. Additional information regarding conversion factors (pdf) and source references (pdf) are also available.

Chemical NameAlternate Chemical
Name/Mixture Description
AmmoniaAnhydrous Ammonia7664-41-7PDF
AmmoniaAmmonia Solution; Ammonium Hydroxide/20 wt% to 44 wt%7664-41-7PDF
Boron Trichloride 10294-34-5-
Butane 106-97-8PDF
Chlorine 7782-50-5PDF
Difluoroethane 75-37-6-
Hydrogen PeroxideConcentration of 52% or
greater by weight
Isobutane1,1-dimenthyl ethane75-28-5PDF
Isopentane 78-78-4PDF
Mercury 7439-97-6PDF
Methane 74-82-8PDF
Methyl ether 115-10-6-
Nitrogen Dioxide 10102-44-0-
Pentane 109-66-0PDF
Propane 74-98-6PDF
Sulfur DioxideAnhydrous7446-09-05-
Titanium Tetrachloride 7550-45-0-


Explosives Information

If a facility manufactures explosives for sale in any quantity, they are likely subject to the provisions of CAPP. An explosive is a substance that is classified as either Division 1.1, 1.2, 1.3, 1.4, or 1.5 in the federal Department of Transportation's Table of Hazardous Materials, codified at 49 CFR 172.101.

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