---
kind: "section"
citation: "40 C.F.R. § 68.130"
title: "40"
number: "68.130"
heading: "List of substances."
url: "https://uscodex.org/cfr/40/68.130"
---

# §68.130. List of substances.

- (a) Regulated toxic and flammable substances under section 112(r) of the Clean Air Act are the substances listed in Tables 1, 2, 3, and 4. Threshold quantities for listed toxic and flammable substances are specified in the tables.
- (b) The basis for placing toxic and flammable substances on the list of regulated substances are explained in the notes to the list.

## Notes

### Amendments

[59 FR 4493, Jan. 31, 1994. Redesignated at 61 FR 31717, June 20, 1996, as amended at 62 FR 45132, Aug. 25, 1997; 63 FR 645, Jan. 6, 1998; 65 FR 13250, Mar. 13, 2000; 82 FR 4702, Jan. 13, 2017]

### Source

Source: 59 FR 4493, Jan. 31, 1994, unless otherwise noted. Redesignated at 61 FR 31717, June 20, 1996.

### Authority

Authority: 42 U.S.C. 7412(r), 7601(a)(1), 7661-7661f.

### Source

Source: 59 FR 4493, Jan. 31, 1994, unless otherwise noted.

### Amendments

[59 FR 4493, Jan. 31, 1994. Redesignated at 61 FR 31717, June 20, 1996, as amended at 62 FR 45132, Aug. 25, 1997; 63 FR 645, Jan. 6, 1998; 65 FR 13250, Mar. 13, 2000; 82 FR 4702, Jan. 13, 2017]