---
kind: "section"
citation: "21 C.F.R. § 184.1265"
title: "21"
number: "184.1265"
heading: "Cuprous iodide."
url: "https://uscodex.org/cfr/21/184.1265"
---

# §184.1265. Cuprous iodide.

- (a) **Cuprous iodide (copper (I) iodide, CuI, CAS Reg.** No. 7681-65-4) is a pure white crystalline powder. It is prepared by the reaction of copper sulfate with potassium iodide under slightly acidic conditions.
- (b) The ingredient must be of a purity suitable for its intended use.
- (c) In accordance with [§ 184.1(b)(2)](/cfr/21/184.1.md?p=b-2), the ingredient is used in food only within the following specific limitations:
- (d) Prior sanctions for this ingredient different from the uses established in this section do not exist or have been waived.

## Notes

### Amendments

[49 FR 24119, June 12, 1984, as amended at 73 FR 8607, Feb. 14, 2008]

### Authority

Authority: 21 U.S.C. 321, 342, 348, 371.

### Source

Source: 42 FR 14653, Mar 15, 1977, unless otherwise noted.

### Amendments

[49 FR 24119, June 12, 1984, as amended at 73 FR 8607, Feb. 14, 2008]