Table 1 to Subpart DD of Part 63—List of Hazardous Air Pollutants (HAP) for Subpart DD

- Table 1 to Subpart DD of Part 63—List of Hazardous Air Pollutants (HAP) for Subpart DD

CAS No. a	Chemical name	fm 305	75-07-0	Acetaldehyde	1.000	75-05-8	Acetonitrile	0.989	98-86-2	Acetophenone	0.314	107-02-8	Acrolein	1.000	107-13-1	Acrylonitrile	0.999	107-05-1	Allyl chloride	1.000	71-43-2	Benzene (includes benzene in gasoline)	1.000	98-07-7	Benzotrichloride (isomers and mixture)	0.958	100-44-7	Benzyl chloride	1.000	92-52-4	Biphenyl	0.864	542-88-1	Bis(chloromethyl)ether b	0.999	75-25-2	Bromoform	0.998	106-99-0	1,3-Butadiene	1.000	75-15-0	Carbon disulfide	1.000	56-23-5	Carbon tetrachloride	1.000	43-58-1	Carbonyl sulfide	1.000	133-90-4	Chloramben	0.633	108-90-7	Chlorobenzene	1.000	67-66-3	Chloroform	1.000	107-30-2	Chloromethyl methyl ether b	1.000	126-99-8	Chloroprene	1.000	98-82-8	Cumene	1.000	94-75-7	2,4-D, salts and esters	0.167	334-88-3	Diazomethane c	0.999	132-64-9	Dibenzofurans	0.967	96-12-8	1,2-Dibromo-3-chloropropane	1.000	106-46-7	1,4-Dichlorobenzene(p)	1.000	107-06-2	Dichloroethane (Ethylene dichloride)	1.000	111-44-4	Dichloroethyl ether (Bis(2-chloroethyl ether)	0.757	542-75-6	1,3-Dichloropropene	1.000	79-44-7	Dimethyl carbamoyl chloride c	0.150	64-67-5	Diethyl sulfate	0.0025	77-78-1	Dimethyl sulfate	0.086	121-69-7	N,N-Dimethylaniline	0.0008	51-28-5	2,4-Dinitrophenol	0.0077	121-14-2	2,4-Dinitrotoluene	0.0848	123-91-1	1,4-Dioxane (1,4-Diethyleneoxide)	0.869	106-89-8	Epichlorohydrin (1-Chloro-2,3-epoxypropane)	0.939	106-88-7	1,2-Epoxybutane	1.000	140-88-5	Ethyl acrylate	1.000	100-41-4	Ethyl benzene	1.000	75-00-3	Ethyl chloride (Chloroethane)	1.000	106-93-4	Ethylene dibromide (Dibromoethane)	0.999	107-06-2	Ethylene dichloride (1,2-Dichloroethane)	1.000	151-56-4	Ethylene imine (Aziridine)	0.867	75-21-8	Ethylene oxide	1.000	75-34-3	Ethylidene dichloride (1,1-Dichloroethane)	1.000		Glycol ethers d that have a Henry's Law constant value equal to or greater than 0.1 Y/X (1.8 × 10−6 atm/gm-mole/m 3) at 25°C	(e)	118-74-1	Hexachlorobenzene	0.97	87-68-3	Hexachlorobutadiene	0.88	67-72-1	Hexachloroethane	0.499	110-54-3	Hexane	1.000	78-59-1	Isophorone	0.506	58-89-9	Lindane (all isomers)	1.000	67-56-1	Methanol	0.855	74-83-9	Methyl bromide (Bromomethane)	1.000	74-87-3	Methyl chloride (Choromethane)	1.000	71-55-6	Methyl chloroform (1,1,1-Trichloroethane)	1.000	78-93-3	Methyl ethyl ketone (2-Butanone)	0.990	74-88-4	Methyl iodide (Iodomethane)	1.0001	108-10-1	Methyl isobutyl ketone (Hexone)	0.9796	624-83-9	Methyl isocyanate	1.000	80-62-6	Methyl methacrylate	0.916	1634-04-4	Methyl tert butyl ether	1.000	75-09-2	Methylene chloride (Dichloromethane)	1.000	91-20-3	Naphthalene	0.994	98-95-3	Nitrobenzene	0.394	79-46-9	2-Nitropropane	0.989	82-68-8	Pentachloronitrobenzene (Quintobenzene)	0.839	87-86-5	Pentachlorophenol	0.0898	75-44-5	Phosgene c	1.000	123-38-6	Propionaldehyde	0.999	78-87-5	Propylene dichloride (1,2-Dichloropropane)	1.000	75-56-9	Propylene oxide	1.000	75-55-8	1,2-Propylenimine (2-Methyl aziridine)	0.945	100-42-5	Styrene	1.000	96-09-3	Styrene oxide	0.830	79-34-5	1,1,2,2-Tetrachloroethane	0.999	127-18-4	Tetrachloroethylene (Perchloroethylene)	1.000	108-88-3	Toluene	1.000	95-53-4	o-Toluidine	0.152	120-82-1	1,2,4-Trichlorobenzene	1.000	71-55-6	1,1,1-Trichloroethane (Methyl chlorform)	1.000	79-00-5	1,1,2-Trichloroethane (Vinyl trichloride)	1.000	79-01-6	Trichloroethylene	1.000	95-95-4	2,4,5-Trichlorophenol	0.108	88-06-2	2,4,6-Trichlorophenol	0.132	121-44-8	Triethylamine	1.000	540-84-1	2,2,4-Trimethylpentane	1.000	108-05-4	Vinyl acetate	1.000	593-60-2	Vinyl bromide	1.000	75-01-4	Vinyl chloride	1.000	75-35-4	Vinylidene chloride (1,1-Dichloroethylene)	1.000	1330-20-7	Xylenes (isomers and mixture)	1.000	95-47-6	o-Xylenes	1.000	108-38-3	m-Xylenes	1.000	106-42-3	p-Xylenes	1.000

Notes:

fm 305 = Method 305 fraction measure factor.

a. CAS numbers refer to the Chemical Abstracts Services registry number assigned to specific compounds, isomers, or mixtures of compounds.

b. Denotes a HAP that hydrolyzes quickly in water, but the hydrolysis products are also HAP chemicals.

c. Denotes a HAP that may react violently with water, exercise caustic is an expected analyte.

d. Denotes a HAP that hydrolyzes slowly in water.

e. The fm 305 factors for some of the more common glycol ethers can be obtained by contacting the Waste and Chemical Processes Group, Office of Air Quality Planning and Standards, Research Triangle Park, NC 27711.

[64 FR 38981, July 20, 1999]