Site Feedback

Title 40

Displaying title 40, up to date as of 6/11/2026. Title 40 was last amended 6/11/2026.
eCFR Content

The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. It is not an official legal edition of the CFR.

Learn more about the eCFR, its status, and the editorial process.

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)
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.