Korean: 페닐벤즈이미다졸설포닉애씨드 · Functions: light stabilizer, uv absorber, uv filter
Approved UV filter MFDS restricted ingredients (UV filter)
Maximum: 4%
Conditions (official MFDS text, Korean):
* 배합한도 : 4%
Source: MFDS — cosmetic ingredient use restrictions · checked Oct 17, 2026
Approved UV filter Annex VI/6
Maximum: 8%(as acid)
Conditions: 2-Phenylbenzimidazole-5-sulphonic acid and its potassium, sodium and triethanolamine salts / Ensulizole
Source: EU CosIng — Annex VI · checked Oct 17, 2026
Approved UV filter M020.10
Maximum: 4%
Source: FDA OTC Monograph M020 (sunscreens) · checked Oct 17, 2026
This is a UV filter. In the U.S., sunscreens are regulated as over-the-counter drugs, so a filter must be on the FDA's list of permitted sunscreen actives to be used in a sunscreen sold there. Compare all filters on Sunscreen filters: Korea vs EU vs U.S.
How Ensulizole is treated in 7 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 | Restricted | MFDS summary (Korean): * 【화장품 중 최대사용농도】 배합한도 (일반) : 총량 8%(산으로 계산) |
| AS ASEAN (10 countries) | Restricted | MFDS summary (Korean): * 【Restrictions】 Maximum authorised concentration in the finished cosmetic product : 8% expressed as acid * 제한 【완제품에서 허용된 최대 농도】 : 8% (자유염기로서) |
| JP Japan | Restricted | MFDS summary (Korean): （注1）空欄は、配合してはならないことを示し、○印は、配合の上限がないことを示す。 * 【100g당 최대 배합량 (점막에 사용하지 않고 씻어내는 화장품 -Cosmetics not used for mucosa and to be washed away)】 : 3.0 g * 【100g당 최대 배합량 (점막에 사용하지 않고 씻어내지 않는 화장품 - Cosmetics not used for mucosa and not to be washed away)】 : 3.0 g * 【100g당 최대 배합량 (점막에 사용하는 화장품 - Cosmetics... |
| TW Taiwan | Restricted | MFDS summary (Korean): * 用途(용도) : 防曬劑 (자외선차단제) * 배합한도 : 8% (以acid 計) 8% (산으로서 계산할 때) |
| CA Canada | Restricted | 【Restrictions】 Maximum Concentration Permitted : ≤ 4% |
| BR Brazil | Restricted | MFDS summary (Korean): * Restrictions 【Maximum concentration permitted at final product】 : 8% (expresado como ácido) * 제한 【완제품에서 허용된 최대 농도】 : 8% (산으로서) |
| AR Argentina | Restricted | MFDS summary (Korean): * Restrictions 【Maximum concentration permitted at final product】 : 8% (expresado como ácido) * 제한 【완제품에서 허용된 최대 농도】 : 8% (산으로서) |
Source: MFDS cosmetic ingredient use restrictions — overseas regulations · checked Oct 17, 2026
PHENYLBENZIMIDAZOLE SULFONIC ACID 페닐벤즈이미다졸설포닉애씨드 Ensulizole
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.
In the EU's CosIng records it is listed as “Approved UV filter” (EU CosIng — Annex VI). The maximum allowed is 8%(as acid). It is allowed for that use within the stated conditions.
In Korea's MFDS records it is listed as “Approved UV filter” (MFDS — cosmetic ingredient use restrictions). The maximum allowed is 4%. It is allowed for that use within the stated conditions.
In the FDA's records it is listed as “Approved UV filter” (FDA OTC Monograph M020 (sunscreens)). The maximum allowed is 4%. It is allowed for that use within the stated conditions.
The EU's CosIng inventory lists its functions as: light stabilizer, uv absorber, uv filter.
Korea's MFDS standard Korean name is 페닐벤즈이미다졸설포닉애씨드.
8 products we checked list it, for example Unleashia A by Unleashia Bae Bae Blue Cushion, ma:nyo Air Light Moisturizing Sunscreen, COSRX Aloe Soothing Sun Cream SPF50+/ PA+++.