Code of Federal Regulations > Title 40 > Chapter I > Part 721 - PART 721—SIGNIFICANT NEW USES OF CHEMICAL SUBSTANCES

U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

Subpart A [§ 721.1 - § 721.47] - Subpart A—General Provisions

Subpart B [§ 721.50 - § 721.91] - Subpart B—Certain Significant New Uses

Subpart C [§ 721.100 - § 721.125] - Subpart C—Recordkeeping Requirements

Subpart D [§ 721.160 - § 721.185] - Subpart D—Expedited Process for Issuing Significant New Use Rules for Selected Chemical Substances and Limitation or Revocation of Selected Significant New Use Rules

Subpart E [§ 721.225 - § 721.12043—721.12076] - Subpart E—Significant New Uses for Specific Chemical Substances