Ask KBeauty Verified™

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

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2,3-Naphthalenediol

Korean: 2,3-나프탈렌다이올 · CAS 92-44-4 · Functions: hair dyeing

KR South Korea (MFDS)

Prohibited MFDS prohibited ingredients

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

EU European Union (CosIng)

Prohibited Annex II/1213

Source: EU CosIng — Annex II · checked Oct 16, 2026

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 2,3-Naphthalenediol is treated in 3 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
TW Taiwan	Prohibited	—

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

Also listed as

2,3-NAPHTHALENEDIOL 2,3-나프탈렌다이올

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.

Frequently asked questions

Is 2,3-Naphthalenediol banned in the European Union?

In the EU's CosIng records it is listed as “Prohibited” (EU CosIng — Annex II).

Is 2,3-Naphthalenediol banned in South Korea?

In Korea's MFDS records it is listed as “Prohibited” (MFDS — cosmetic ingredient use restrictions).

Is 2,3-Naphthalenediol allowed in cosmetics in the U.S.?

We found no specific rule for it in the FDA's records. That is not an approval or a safety statement.

What is 2,3-Naphthalenediol used for in cosmetics?

The EU's CosIng inventory lists its functions as: hair dyeing.

What is 2,3-Naphthalenediol called on Korean labels?

Korea's MFDS standard Korean name is 2,3-나프탈렌다이올.

What is the CAS number of 2,3-Naphthalenediol?

CAS 92-44-4 (from official records).