The U.S. Environmental Protection Agency (EPA) has reopened the online dockets for 20 high-priority substances. According to the December 9, 2021, memorandum authorizing the re-opening of the dockets, EPA is re-opening these dockets to receive use, hazard, exposure, and any other information that can help inform their risk evaluations. Information must be submitted by June 9, 2022, when EPA will close the dockets. Information submitted to the docket should be identified by the docket identification (ID) number associated with the relevant chemical. The 20 high-priority chemicals are:

• p-Dichlorobenzene;

• 1,2-Dichloroethane;

• trans-1,2-Dichloroethylene;

• o-Dichlorobenzene;

• 1,1,2-Trichloroethane;

• 1,2-Dichloropropane;

• 1,1-Dichloroethane;

• Dibutyl phthalate (DBP) (1,2-Benzene-dicarboxylic acid, 1,2-dibutyl ester);

• Butyl benzyl phthalate (BBP) (1,2-Benzene-dicarboxylic acid, 1-butyl 2-(phenylmethyl) ester);

• Di-ethylhexyl phthalate (DEHP) (1,2-Benzene-dicarboxylic acid, 1,2-bis(2-ethylhexyl) ester);

• Di-isobutyl phthalate (DIBP) (1,2-Benzene-dicarboxylic acid, 1,2-bis-(2-methylpropyl) ester);

• Dicyclohexyl phthalate;

• 4,4'-(1-Methylethylidene)bis[2,6-dibromophenol] (TBBPA);

• Tris(2-chloroethyl) phosphate (TCEP);

• Phosphoric acid, triphenyl ester (TPP);

• Ethylene dibromide;

• 1,3-Butadiene;

• 1,3,4,6,7,8-Hexahydro-4,6,6,7,8,8-hexamethylcyclopenta [g]-2-benzopyran (HHCB);

• Formaldehyde; and

• Phthalic anhydride.

The docket ID number and contact information for each chemical lead is available in the memorandum.