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

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[4-(4-Hydroxy-3-iodophenoxy)-3,5-diiodophenyl]acetic acid

Korean: [4-(4-하이드록시-3-아이오도페녹시)-3,5-다이아이오도페닐]아세틱애씨드 · CAS 51-24-1 ·

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 [4-(4-Hydroxy-3-iodophenoxy)-3,5-diiodophenyl]acetic acid is treated in 5 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	—
CA Canada	Prohibited	—
BR Brazil	Prohibited	—
AR Argentina	Prohibited	—

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

Also listed as

[4-(4-Hydroxy-3-iodophenoxy)-3,5-diiodophenyl]acetic acid [4-(4-하이드록시-3-아이오도페녹시)-3,5-다이아이오도페닐]아세틱애씨드

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 [4-(4-Hydroxy-3-iodophenoxy)-3,5-diiodophenyl]acetic acid 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 [4-(4-Hydroxy-3-iodophenoxy)-3,5-diiodophenyl]acetic acid banned in South Korea?

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

Is [4-(4-Hydroxy-3-iodophenoxy)-3,5-diiodophenyl]acetic acid 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 [4-(4-Hydroxy-3-iodophenoxy)-3,5-diiodophenyl]acetic acid called on Korean labels?

Korea's MFDS standard Korean name is [4-(4-하이드록시-3-아이오도페녹시)-3,5-다이아이오도페닐]아세틱애씨드.

What is the CAS number of [4-(4-Hydroxy-3-iodophenoxy)-3,5-diiodophenyl]acetic acid?

CAS 51-24-1 (from official records).