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 Code of Federal Regulations (Last Updated: May 6, 2024)
 Title 40 - Protection of Environment
 Chapter I - Environmental Protection Agency
 SubChapter C - Air Programs
 Part 63 - National Emission Standards for Hazardous Air Pollutants for Source Categories
 Subpart U - National Emission Standards for Hazardous Air Pollutant Emissions: Group I Polymers and Resins

  Table 5 to Subpart U of Part 63 - Known Organic HAP Emitted From the Production of Elastomer Products  

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  • Table 5 to Subpart U of Part 63 - Known Organic HAP Emitted From the Production of Elastomer Products

    [Known organic HAP emitted from the production of elastomer products]

    Organic HAP/Chemical name (CAS No.) Elastomer product/subcategory
    BR EPI EPR HYP NEO NBL NBR PBR/SBRS PSR SBL SBRE
    Acrylonitrile (107131) X X
    1,3 Butadiene (106990) X X X X X
    Carbon Disulfide X X X X X
    Carbon Tetrachloride (56235) X
    Chlorobenzene (108907) X
    Chloroform (67663) X
    Chloroprene (126998) X
    Epichlorohydrin (106898) X
    Ethylbenzene (100414) X X
    Ethylene Dichloride (107062) X
    Ethylene Oxide (75218) X X
    Formaldehyde (50000) X X
    Hexane (110543) X X X
    Methanol (67561) X X
    Methyl Chloride (74873) X X
    Propylene Oxide (75569) X
    Styrene (100425) X X X
    Toluene (108883) X X X X
    Xylenes (1330207) X
    Xylene (m-) (108383) X
    Xylene (o-) (95476) X
    Xylene (p-) (106423) X

    CAS No. = Chemical Abstract Service Number.

    BR = Butyl Rubber.

    EPI = Epichlorohydrin Rubber.

    EPR = Ethylene Propylene Rubber.

    HYP = HypalonTM.

    NEO = Neoprene.

    NBL = Nitrile Butadiene Latex.

    NBR = Nitrile Butadiene Rubber.

    PBR/SBRS = Polybutadiene and Styrene Butadiene Rubber by Solution.

    PSR = Polysulfide Rubber.

    SBL = Styrene Butadiene Latex.

    SBRE = Styrene Butadiene Rubber by Emulsion.

    [76 FR 22594, Apr. 21, 2011]