---
kind: "section"
citation: "21 C.F.R. § 74.2705"
title: "21"
number: "74.2705"
heading: "FD&C Yellow No. 5."
url: "https://uscodex.org/cfr/21/74.2705"
---

# §74.2705. FD&C Yellow No. 5.

- (a) **Identity.** The color additive FD&C Yellow No. 5 is principally the trisodium salt of 4,5-dihydro-5-oxo-(1-4-sulfophenyl)-4-[(4-sulfophenyl)azo]-1H-pyrazole-3-carboxylic acid (CAS Reg. No. 1934-21-0). To manufacture the additive, 4-aminobenzenesulfonic acid is diazotized using hydrochloric acid and sodium nitrite. The diazo compound is coupled with 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-1H-pyrazole-3-carboxylic acid or with the methyl ester, the ethyl ester, or a salt of this carboxylic acid. The resulting dye is purified and isolated as the sodium salt.
- (b) **Specifications.**
  - (1) **FD&C Yellow No.** 5 shall conform to the following specifications and shall be free from impurities other than those named to the extent that such other impurities may be avoided by good manufacturing practice:
  - (2) **FD&C Yellow No.** 5 Aluminum Lake shall be prepared in accordance with the requirements of [§ 82.51](/cfr/21/82.51.md) of this chapter.
- (c) **Uses and restrictions.**
  - (1) **FD&C Yellow No.** 5 may be safely used for coloring cosmetics generally, including cosmetics intended for use in the area of the eye, in amounts consistent with current good manufacturing practice.
  - (2) **FD&C Yellow No.** 5 Aluminum Lake may be safely used for coloring cosmetics intended for use in the area of the eye, subject to the restrictions on use of color additives in § [70.5(b)](/cfr/21/70.5.md?p=b) and [(c)](/cfr/21/70.5.md?p=c) of this chapter, in amounts consistent with current good manufacturing practice.
- (d) **Labeling.** The label of the color additive shall conform to the requirements of [§ 70.25](/cfr/21/70.25.md) of this chapter.
- (e) **Certification.** All batches of FD&C Yellow No. 5 shall be certified in accordance with regulations in [part 80](/cfr/21/part80.md) of this chapter.

## Notes

### Amendments

[50 FR 35782, Sept. 4, 1985, as amended at 51 FR 24524, July 7, 1986; 59 FR 60898, Nov. 29, 1994]

### Authority

Authority: 21 U.S.C. 321, 341, 342, 343, 348, 351, 352, 355, 361, 362, 371, 379e.

### Source

Source: 42 FR 15654, Mar. 22, 1977, unless otherwise noted.

### Amendments

[50 FR 35782, Sept. 4, 1985, as amended at 51 FR 24524, July 7, 1986; 59 FR 60898, Nov. 29, 1994]