StacksVerified U.S. regulatory reference

40 CFR §721.4140

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov
  1. (a)Chemical substance and significant new uses subject to reporting.
    1. (1)The chemical substance 1,2,3,4,7,7-hexachloronorbornadiene, CAS Number 3389-71-7, is subject to reporting under this section for the significant new use described in paragraph (a)(2) of this section.
    2. (2)The significant new use is: Use other than as an intermediate in the production of isodrin or endrin.
  2. (b)Specific requirements. The provisions of subpart A of this part apply to this section except as modified by this paragraph.
    1. (1)Definitions. In addition to the definitions in § 721.3, the following definitions apply:
      1. (i)“Endrin” means the pesticide 2,7:3,6-Dimethanonaphth[2,3-b]oxirene, 3,4,5,6,9,9-hexachloro-1a,2,2a,3,6,6a,7,7a-octahydro-, (1a alpha, 2beta,2abeta,3alpha,6alpha,6abeta, 7beta,7aalpha)-, CAS Number 72-20-8.
      2. (ii)“Isodrin” means the pesticide 1,4:5,8-Dimethano-naphthalene,1,2,3,4,10,10-hexachloro-1,4,4a,5,8,8a-hexahydro-, (1alpha, 4alpha, 4abeta, 5beta, 8beta, 8abeta)-, CAS Number 465-73-6.
    2. (2)[Reserved]