---
kind: "section"
citation: "21 C.F.R. § 82.5"
title: "21"
number: "82.5"
heading: "General specifications for straight colors."
url: "https://uscodex.org/cfr/21/82.5"
---

# §82.5. General specifications for straight colors.


No batch of a straight color listed in subpart B, C, or D shall be certified under this part unless:

- (a) It is free from all impurities (other than those named in [paragraph (b)](#b) of this section or in the specifications set forth in such paragraph for such color) to the extent that such impurities can be avoided by good manufacturing practice.
- (b) **It conforms to the following specifications—**
  - (1) **In the case of a straight color listed in subpart B—**
    - (i) Lead (as Pb), not more than 0.001 percent.
    - (ii) Arsenic (as As2O3), not more than 0.00014 percent.
    - (iii) **Heavy metals (except Pb and As) (by precipitation as sulfides), not more than trace.**
  - (2) **In the case of a straight color listed in subpart C or D—**
    - (i) Lead (as Pb), not more than 0.002 percent.
    - (ii) Arsenic (as As2O3), not more than 0.0002 percent.
    - (iii) Heavy metals (except Pb and As) (by precipitation as sulfides), not more than 0.003 percent.
  - (3) **In the case of a straight color which contains a barium salt listed in subpart C or D—** soluble barium (in dilute HCl) (as BaCl2), not more than 0.05 percent.

## Notes

### Authority

Authority: 21 U.S.C. 371, 379e, 379e note.

### Source

Source: 42 FR 15669, Mar. 22, 1977, unless otherwise noted.