{"data":{"id":"us/40-cfr-table-5-to-subpart-u-of-part-63","jurisdiction":"us","citation":"40 CFR Table 5 to Subpart U of Part 63","heading":"Table 5 to Subpart U of Part 63—Known Organic HAP Emitted From the Production of Elastomer Products","body":"[Known organic HAP emitted from the production of elastomer products]\nOrganic HAP/Chemical name (CAS No.) Elastomer product/subcategory\nBR EPI EPR HYP NEO NBL NBR PBR/SBRS PSR SBL SBRE\nAcrylonitrile (107131) X X\n1,3 Butadiene (106990) X X X X X\nCarbon Disulfide X X X X X\nCarbon Tetrachloride (56235) X\nChlorobenzene (108907) X\nChloroform (67663) X\nChloroprene (126998) X\nEpichlorohydrin (106898) X\nEthylbenzene (100414) X X\nEthylene Dichloride (107062) X\nEthylene Oxide (75218) X X\nFormaldehyde (50000) X X\nHexane (110543) X X X\nMethanol (67561) X X\nMethyl Chloride (74873) X X\nPropylene Oxide (75569) X\nStyrene (100425) X X X\nToluene (108883) X X X X\nXylenes (1330207) X\nXylene (m-) (108383) X\nXylene (o-) (95476) X\nXylene (p-) (106423) X\nCAS No. = Chemical Abstract Service Number.\nBR = Butyl Rubber.\nEPI = Epichlorohydrin Rubber.\nEPR = Ethylene Propylene Rubber.\nHYP = Hypalon TM.\nNEO = Neoprene.\nNBL = Nitrile Butadiene Latex.\nNBR = Nitrile Butadiene Rubber.\nPBR/SBRS = Polybutadiene and Styrene Butadiene Rubber by Solution.\nPSR = Polysulfide Rubber.\nSBL = Styrene Butadiene Latex.\nSBRE = Styrene Butadiene Rubber by Emulsion.","path":["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"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"66d1591f7a9e7a2aa4386260cd94a1160b8109d67e5be3454ee6d93825c8d2d8","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-table-4-to-subpart-u-of-part-63","next":"us/40-cfr-table-6-to-subpart-u-of-part-63"},"notice":"GroundRules: Original legal text. Not legal advice."}