---
kind: "section"
citation: "40 C.F.R. § 261.22"
title: "40"
number: "261.22"
heading: "Characteristic of corrosivity."
url: "https://uscodex.org/cfr/40/261.22"
---

# §261.22. Characteristic of corrosivity.

- (a) A solid waste exhibits the characteristic of corrosivity if a representative sample of the waste has either of the following properties:
  - (1) It is aqueous and has a pH less than or equal to 2 or greater than or equal to 12.5, as determined by a pH meter using Method 9040C in “Test Methods for Evaluating Solid Waste, Physical/Chemical Methods,” EPA Publication SW-846, as incorporated by reference in [§ 260.11](/cfr/40/260.11.md) of this chapter.
  - (2) It is a liquid and corrodes steel (SAE 1020) at a rate greater than 6.35 mm (0.250 inch) per year at a test temperature of 55 °C (130 °F) as determined by Method 1110A in “Test Methods for Evaluating Solid Waste, Physical/Chemical Methods,” EPA Publication SW-846, and as incorporated by reference in [§ 260.11](/cfr/40/260.11.md) of this chapter.
- (b) A solid waste that exhibits the characteristic of corrosivity has the EPA Hazardous Waste Number of D002.

## Notes

### Amendments

[45 FR 33119, May 19, 1980, as amended at 46 FR 35247, July 7, 1981; 55 FR 22684, June 1, 1990; 58 FR 46049, Aug. 31, 1993; 70 FR 34561, June 14, 2005]

### Authority

Authority: 42 U.S.C. 6905, 6912(a), 6921, 6922, 6924(y) and 6938.

### Source

Source: 45 FR 33119, May 19, 1980, unless otherwise noted.

### Amendments

[45 FR 33119, May 19, 1980, as amended at 46 FR 35247, July 7, 1981; 55 FR 22684, June 1, 1990; 58 FR 46049, Aug. 31, 1993; 70 FR 34561, June 14, 2005]