Code of Federal Regulations Title 40. Protection of Environment § 40.129.4 Toxic pollutants

(a) Aldrin/Dieldrin—Aldrin means the compound aldrin as identified by the chemical name, 1,2,3,4,10,10–hexachloro–1,4,4a,5,8,8a-hexahydro - 1,4 - endo–5,8–exo-dimethanonaphthalene;  “Dieldrin” means the compound the dieldrin as identified by the chemical name 1,2,3,4,10,10–hexachloro - 6,7 - epoxy - 1,4,4a,5,6,7,8,8a-octahydro–1,4–endo–5,8–exo-dimethanonaphthalene.

(b) DDT—DDT means the compounds DDT, DDD, and DDE as identified by the chemical names:  (DDT)–1,1,1–trichloro–2,2 - bis(p - chlorophenyl) ethane and some o,p′-isomers;  (DDD) or (TDE) - 1,1 - dichloro - 2,2–bis(p-chlorophenyl) ethane and some o,p′-isomers;  (DDE) - 1,1 - dichloro–2,2–bis(p-chlorophenyl) ethylene.

(c) Endrin—Endrin means the compound endrin as identified by the chemical name 1,2,3,4,10,10–hexachloro–6,7–epoxy - 1,4,4a,5,6,7,8,8a - octahydro - 1,4–endo–5,8–endodimethanonaphthalene.

(d) Toxaphene—Toxaphene means a material consisting of technical grade chlorinated camphene having the approximate formula of C₁₀H₁₀Cl₈ and normally containing 67–69 percent chlorine by weight.

(e) Benzidine—Benzidine means the compound benzidine and its salts as identified by the chemical name 4,4′–diaminobiphenyl.

(f) Polychlorinated Biphenyls (PCBs)—polychlorinated biphenyls (PCBs) means a mixture of compounds composed of the biphenyl molecule which has been chlorinated to varying degrees.