Ask KBeauty Verified™

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

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Sulfamethoxazole

Korean: 설파메톡사졸 · CAS 723-46-6 ·

KR South Korea (MFDS)

Prohibited only in certain forms or uses MFDS prohibited ingredients

Conditions (official MFDS text, Korean):
톨루엔설폰아미드/포름알데하이드수지, 톨루엔설폰아미드/에폭시수지 제외

Source: MFDS — cosmetic ingredient use restrictions · checked Oct 17, 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 Sulfamethoxazole is treated in 6 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	—
TW Taiwan	Prohibited	—
CA Canada	Prohibited	—
BR Brazil	Prohibited	—
AR Argentina	Prohibited	—

Source: MFDS cosmetic ingredient use restrictions — overseas regulations · checked Oct 17, 2026

Also listed as

Sulfamethoxazole 설파메톡사졸

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 Sulfamethoxazole banned in the European Union?

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

Is Sulfamethoxazole banned in South Korea?

In Korea's MFDS records it is listed as “Prohibited only in certain forms or uses” (MFDS — cosmetic ingredient use restrictions). It is not a general ban; see the condition on the ingredient page.

Is Sulfamethoxazole 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 Sulfamethoxazole called on Korean labels?

Korea's MFDS standard Korean name is 설파메톡사졸.

What is the CAS number of Sulfamethoxazole?

CAS 723-46-6 (from official records).