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U.S. Department of Health and Human Services

CFR - Code of Federal Regulations Title 21

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The information on this page is current as of April 1 2018.

For the most up-to-date version of CFR Title 21, go to the Electronic Code of Federal Regulations (eCFR).

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Help | More About 21CFR
[Code of Federal Regulations]
[Title 21, Volume 1]
[Revised as of April 1, 2018]
[CITE: 21CFR74.1336]



TITLE 21--FOOD AND DRUGS
CHAPTER I--FOOD AND DRUG ADMINISTRATION
DEPARTMENT OF HEALTH AND HUMAN SERVICES
SUBCHAPTER A--GENERAL

PART 74 -- LISTING OF COLOR ADDITIVES SUBJECT TO CERTIFICATION

Subpart B--Drugs

Sec. 74.1336 D&C Red No. 36.

(a) Identity. (1) The color additive D&C red No. 36 is 1-[(2-chloro-4-nitrophenyl)azo]-2-naphthalenol (CAS Reg. No. 2814-77-9). The color additive is manufactu red by diazotization of 2-chloro-4-nitrobenzenamine in acid medium and coupling with 2-naphthalenol in acid medium.

(2) Color additive mixtures for drug use made with D&C red No. 36 may contain only those diluents that are suitable and that are listed in part 73 of this chapter as safe for use in color additive mixtures for coloring drugs.

(b) Specifications. D&C red No. 36 shall conform to the following specifications and shall be free from impurities other than those named to the extent that such impurities may be avoided by current good manufacturing practice:

Volatile matter at 135 deg. C (275 deg. F), not more than 1.5 percent.

Matter insoluble in toluene, not more than 1.5 percent.

2-Chloro-4-nitrobenzenamine, not more than 0.3 percent.

2-Naphthalenol, not more than 1 percent.

2,4-Dinitrobenzenamine, not more than 0.02 percent.

1-[(2,4-Dinitrophenyl)azo]-2-naphthalenol, not more than 0.5 percent.

4-[(2-Chloro-4-nitrophenyl)azo]-1-naphthalenol, not more than 0.5 percent.

1-[(4-Nitrophenyl)azo]-2-naphthalenol, not more than 0.3 percent.

1-[(4-Chloro-2-nitrophenyl)azo]-2-naphthalenol, not more than 0.3 percent.

Lead (as Pb), not more than 20 parts per million.

Arsenic (as As), not more than 3 parts per million.

Mercury (as Hg), not more than 1 part per million.

Total color, not less than 95 percent.

(c) Uses and restrictions. The color additive D&C red No. 36 may be safely used for coloring ingested drugs, other than mouthwashes and dentifrices, in amounts not to exceed 1.7 milligrams per daily dose of the drug for drugs that are taken continuously only for less than 1 year. For drugs taken continuously for longer than 1 year, the color additive shall not be used in amounts to exceed 1.0 milligram per daily dose of the drug. D&C red No. 36 may be safely used for coloring externally applied drugs in amounts consistent with current good manufacturing practice.

(d) Labeling requirements. The label of the color additive and any mixtures prepa red therefrom intended solely or in part for coloring purposes shall conform to the requirements of 70.25 of this chapter.

(e) Certification. All batches of D&C red No. 36 shall be certified in accordance with regulations in part 80 of this chapter.

[53 FR 29031, Aug. 2, 1988; 53 FR 35255, Sept. 12, 1988, as amended at 53 FR 52130, Dec. 27, 1988]

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