---
kind: "section"
citation: "40 C.F.R. § 721.1"
title: "40"
number: "721.1"
heading: "Scope and applicability."
url: "https://uscodex.org/cfr/40/721.1"
---

# §721.1. Scope and applicability.

- (a) This part identifies uses of chemical substances, except for microorganisms regulated under [part 725](/cfr/40/part725.md) of this chapter, which EPA has determined are significant new uses under the authority of [section 5(a)(2)](/cfr/40/5.md?p=a-2) of the Toxic Substances Control Act. In addition, it specifies procedures for manufacturers and processors to report on those significant new uses. This subpart A contains general provisions applicable to this part. [Subpart B](/cfr/40/subpartB.md) of this part identifies generic requirements for certain significant new uses cross referenced in specific provisions of [subpart E](/cfr/40/subpartE.md) of this part. [Subpart C](/cfr/40/subpartC.md) of this part identifies generic reporting requirements for certain significant new uses cross referenced in specific provisions of [subpart E](/cfr/40/subpartE.md) of this part. [Subpart E](/cfr/40/subpartE.md) of this part identifies chemical substances and their significant new uses.
- (b) This subpart A contains provisions governing submission and review of notices for the chemical substances and significant new uses identified in subpart E of this part. The provisions of this subpart A apply to the chemical substances and significant new uses identified in subpart E of this part, except to the extent that they are specifically modified or supplanted by specific requirements in subpart E of this part. In the event of a conflict between the provisions of this subpart A and the provisions of subpart E of this part, the provisions of subpart E of this part shall govern.
- (c) **The provisions of part 720 of this chapter apply to this part 721.** For purposes of this part 721, wherever the phrase “new chemical substance” appears in [part 720](/cfr/40/part720.md) of this chapter, it shall mean the chemical substance subject to this part 721. In the event of a conflict between the provisions of [part 720](/cfr/40/part720.md) of this chapter and the provisions of this part 721, the provisions of this part 721 shall govern.

## Notes

### Amendments

[53 FR 28358, July 27, 1988, as amended at 62 FR 17932, Apr. 11, 1997; 87 FR 39764, July 5, 2022]

### Authority

Authority: 15 U.S.C. 2604, 2607, and 2625(c).

### Source

Source: 49 FR 35018, Sept. 5, 1984, unless otherwise noted.

### Amendments

[53 FR 28358, July 27, 1988, as amended at 62 FR 17932, Apr. 11, 1997; 87 FR 39764, July 5, 2022]