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KBeauty Verified™ — K-beauty checked against official records from Korea, the EU and the U.S.

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Google · Gemini0

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3-Hydroxy-4-[(2-hydroxynaphthyl)azo]-7-nitronaphthalene-1-sulphonic acid and its salts

Korean: 3-하이드록시-4-[(2-하이드록시나프틸)아조]-7-나이트로나프탈렌-1-설포닉애씨드 및 그 염류 · CAS 16279-54-2 ·

KR South Korea (MFDS)

Prohibited MFDS prohibited ingredients

Source: MFDS — cosmetic ingredient use restrictions · checked Oct 16, 2026

EU European Union (CosIng)

No specific rule on file.

US United States (FDA)

No specific rule on file. The FDA regulates few cosmetic ingredients by name; no rule does not mean approval.

Other markets

How 3-Hydroxy-4-[(2-hydroxynaphthyl)azo]-7-nitronaphthalene-1-sulphonic acid and its salts is treated in 2 more markets, from the overseas cosmetic regulation database compiled by Korea's MFDS. Always confirm with the regulator of that country before selling there.

Market	Status	Conditions
CN China	Prohibited	—
AS ASEAN (10 countries)	Prohibited	MFDS summary (Korean): when used as a substance in hair dye products^염모제로 사용되는 경우에 한함

Source: MFDS cosmetic ingredient use restrictions — overseas regulations · checked Oct 16, 2026

Also listed as

3-Hydroxy-4-[(2-hydroxynaphthyl)azo]-7-nitronaphthalene-1-sulphonic acid and its salts 3-하이드록시-4-[(2-하이드록시나프틸)아조]-7-나이트로나프탈렌-1-설포닉애씨드 및 그 염류

Information only, not medical advice. Rules change — always check the linked official source. If you are pregnant, have a skin condition or allergies, ask a dermatologist or pharmacist.