Code of Federal Regulations > Title 40 > Chapter I > Part 63 > Subpart OOO > Appendix - Table 2 to Subpart OOO of Part 63—Known Organic Hazardous Air Pollutants (HAP) From the Manufacture of Amino/Phenolic Resins

Regulations last checked for updates: Apr 05, 2025

Title 40 - Protection of Environment last revised: Nov 05, 2025

Appendix - Table 2 to Subpart OOO of Part 63—Known Organic Hazardous Air Pollutants (HAP) From the Manufacture of Amino/Phenolic Resins

Organic HAP	CAS Number	Organic HAP subject to cooling tower monitoring requirements in § 63.1409 (Yes/No)
Organic HAP	CAS Number	Column A	Column B
Acrylamide	79-06-1	No	No
Aniline	62-53-3	Yes	No
Biphenyl	92-52-4	Yes	Yes
Cresol and cresylic acid (mixed)	1319-77-3	Yes	No
Cresol and cresylic acid (m-)	108-39-4	Yes	No
Cresol and cresylic acid (o-)	95-48-7	Yes	No
Cresol and cresylic acid (p-)	106-44-5	Yes	No
Diethanolamine	111-42-2	No	No
Dimethylformamide	68-12-2	No	No
Ethylbenzene	100-41-4	Yes	Yes
Ethylene glycol	107-21-1	No	No
Formaldehyde	50-00-0	Yes	No
Glycol ethers	0	No	No
Methanol	67-56-1	Yes	Yes
Methyl ethyl ketone	78-93-3	Yes	Yes
Methyl isobutyl ketone	108-10-1	Yes	Yes
Naphthalene	91-20-3	Yes	Yes
Phenol	108-95-2	Yes	No
Styrene	100-42-5	Yes	Yes
Toluene	108-88-3	No	Yes
Xylenes (NOS)	1330-20-7	Yes	Yes
Xylene (m-)	108-38-3	Yes	Yes
Xylene (o-)	95-47-6	Yes	Yes
Xylene (p-)	106-42-3	Yes	Yes

CAS No. = Chemical Abstract Registry Number.

authority: 42 U.S.C. 7401

source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.