40 CFR Part 63, Table 6

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗

Thermoplastic product/Subcategory	Organic HAP/chemical name(CAS No.)
Acet-aldehyde (75-07-0)	Acrylo-nitrile (107-13-1) \| 1,3 Buta-diene (106-99-0) \| 1,4-Dioxane (123-91-1) \| Ethylene Glycol (107-21-1) \| Methanol (67-56-1) \| Methyl metha-crylate (80-62-6) \| Styrene (100-42-5)
ABS latex	\| ✔ \| ✔ \| \| \| \| \| ✔
ABS using a batch emulsion process	\| ✔ \| ✔ \| \| \| \| \| ✔
ABS using a batch suspension process	\| ✔ \| ✔ \| \| \| \| \| ✔
ABS using a continuous emulsion process	\| ✔ \| ✔ \| \| \| \| \| ✔
ABS using a continuous mass process	\| ✔ \| ✔ \| \| \| \| \| ✔
ASA/AMSAN	\| ✔ \| \| \| \| \| \| ✔
EPS	\| \| \| \| \| \| \| ✔
MABS	\| ✔ \| ✔ \| \| \| \| \| ✔
MBS	\| \| ✔ \| \| \| \| ✔ \| ✔
Nitrile resin	\| ✔ \| \| \| \| \| \|
PET using a batch dimethyl terephthalate process	✔ \| \| \| ✔ \| ✔ \| ✔ \| \|
PET using a batch terephthalic acid process	✔ \| \| \| ✔ \| ✔ \| \| \|
PET using a continuous dimethyl terephthalate process	✔ \| \| \| ✔ \| ✔ \| ✔ \| \|
PET using a continuous terephthalic acid process	✔ \| \| \| ✔ \| ✔ \| \| \|
PET using a continuous terephthalic acid high viscosity multiple end finisher process	✔ \| \| \| ✔ \| ✔ \| \| \|
Polystyrene resin using a batch process	\| \| \| \| \| \| \| ✔
Polystyrene resin using a continuous process	\| \| \| \| \| \| \| ✔
SAN using a batch process	\| ✔ \| \| \| \| \| \| ✔
SAN using a continuous process	\| ✔ \| \| \| \| \| \| ✔

CAS No. = Chemical Abstract Service Number.

ABS = Acrylonitrile butadiene styrene resin.

ASA/AMSAN = Acrylonitrile styrene resin/alpha methyl styrene acrylonitrile resin.

EPS = expandable polystyrene resin.

MABS = methyl methacrylate acrylonitrile butadiene styrene resin.

PET = poly(ethylene terephthalate) resin.

SAN = styrene acrylonitrile resin.

MBS = methyl methacrylate butadiene styrene resin.

[66 FR 36942, July 16, 2001]