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        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
        CAS NumberPDF
        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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