EPA Seeks Comment on ITC’s Revisions to TSCA Section 4(e) Priority Testing List



The U.S. Environmental Protection Agency (EPA) published a Federal Register notice on April 28, 2021, announcing a 30-day comment period on the Toxic Substances Control Act (TSCA) Interagency Testing Committee’s (ITC) revisions to the Priority Testing List.  86 Fed. Reg. 22414.  In the 74th ITC Report, ITC revised the TSCA Section 4(e) Priority Testing List by adding the following 15 high-priority substances designated pursuant to TSCA Section 6(b) and 24 organohalogen flame retardants:

Chemical SubstanceChemical Abstracts Service Registry Number
High-Priority Substances
1,3-Butadiene106-99-0
Butyl benzyl phthalate (BBP) - 1,2-Benzene- dicarboxylic acid, 1- butyl 2(phenylmethyl) ester85-68-7
Dibutyl phthalate (DBP) (1,2-Benzene- dicarboxylic acid, 1,2- dibutyl ester)84-74-2
o-Dichlorobenzene95-50-1
p-Dichlorobenzene106-46-7
trans-1,2- Dichloroethylene156-60-5
1,2-Dichloropropane78-87-5
Dicyclohexyl phthalate84-61-7
Di-ethylhexyl phthalate (DEHP) - (1,2-Benzene- dicarboxylic acid, 1,2- bis(2- ethylhexyl) ester)117-81-7
Di-isobutyl phthalate (DIBP) - (1,2-Benzene- dicarboxylic acid, 1,2- bis-(2methylpropyl) ester)84-69-5
Formaldehyde50-00-0
1,3,4,6,7,8-Hexahydro-4,6,6,7,8,8-hexamethylcyclopenta [g]-2-benzopyran (HHCB)1222-05-5
Phthalic anhydride85-44-9
4,4'-(1-Methylethylidene)bis[2, 6-dibromophenol] (TBBPA)79-94-7
1,1,2-Trichloroethane79-00-5
Organohalogen Flame Retardants
Bis(hexachlorocyclopentadieno)cyclooctane13560-89-9
1,2-Bis(2,4,6-tribromophenoxy)ethane37853-59-1
1,1'-Ethane-1,2-diylbis(pentabromobenzene)84852-53-9
2-(2-Hydroxyethoxy)ethyl 2-hydroxypropyl 3,4,5,6-tetrabromophthalate20566-35-2
2,2'-[(1-Methylethylidene)bis[(2,6-dibromo-4,1-
phenylene)oxymethylene]]bis[oxirane]
3072-84-2
Mixture of chlorinated linear alkanes C14-17 with 45-52 % chlorine85535-85-9
N,N-Ethylene-bis(tetrabromophthalimide)32588-76-4
Pentabromochlorocyclohexane87-84-3
(Pentabromophenyl)methyl acrylate59447-55-1
Pentabromotoluene87-83-2
Perbromo-1,4-diphenoxybenzene58965-66-5
Phosphonic acid, (2-chloroethyl)-, bis(2-chloroethyl) ester6294-34-4
Propanoic acid, 2-bromo-, methyl ester5445-17-0
Tetrabromobisphenol A-bis(2,3-dibromopropyl ether)21850-44-2
Tetrabromobisphenol A bis(2-hydroxyethyl) ether4162-45-2
Tetrabromobisphenol A diallyl ether25327-89-3
Tetrabromobisphenol A dimethyl ether37853-61-5
2,4,6-Tribromoaniline147-82-0
1,3,5-Tribromo-2-(prop-2-en-1-yloxy)benzene3278-89-5
Tris(2-chloroethyl) phosphite140-08-9
Tris(2,3-dibromopropyl) phosphate126-72-7
1,3,5-Tris(2,3-dibromopropyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione52434-90-9
Tris(tribromoneopentyl)phosphate19186-97-1
2,4,6-Tris-(2,4,6-tribromophenoxy)-1,3,5-triazine25713-60-4

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