Korean: 디아졸리디닐우레아 · CAS 78491-02-8 · Functions: preservative
Restricted MFDS restricted ingredients
Maximum: 0.50%
Conditions (official MFDS text, Korean):
* 배합한도 : 0.50%
Source: MFDS — cosmetic ingredient use restrictions · checked Oct 17, 2026
Approved preservative Annex V/46
Maximum: 0.5%
Source: EU CosIng — Annex V · checked Oct 17, 2026
Banned in some U.S. states OR-SB546
Conditions: Oregon: Toxic-Free Cosmetics Act (SB 546, Or. Laws 2023 ch. 575) · ORS 431A.345 · From 2027-01-01 · intentionally added (our mapping from Washington's named list) · Matched by our INCI mapping of a substance class
Source: Oregon — Toxic-Free Cosmetics Act (SB 546, Or. Laws 2023 ch. 575) · checked Oct 17, 2026
Banned in some U.S. states WA-TFCA
Conditions: Washington: Toxic-Free Cosmetics Act (Substitute House Bill 1047, Chapter 455, Laws of 2023) and Cosmetic Products Restrictions Rule (ch. 173-339 WAC, WSR 25-18-057, eff. 2025-09-28) · RCW 70A.560.005-.900 (2023 c 455); WAC 173-339-110 · From 2027-01-01 · intentionally added formaldehyde releaser (WAC 173-339-110(2)(b) table), incl. aliases of name and CAS RN; existing in-state retailer stock may be sold until 2028-01-01 (Ecology: until 2027-12-31)
Source: Washington — Toxic-Free Cosmetics Act (Substitute House Bill 1047, Chapter 455, Laws of 2023) · checked Oct 17, 2026
How Diazolidinyl Urea 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 | Restricted | MFDS summary (Korean): * 【화장품 중 최대사용농도】 배합한도 (일반) : 0.5% |
| AS ASEAN (10 countries) | Restricted | MFDS summary (Korean): * 【Restrictions】 Maximum authorised concentration in the finished cosmetic product : 0.5% * 제한 【완제품에서 허용된 최대 농도】 : 0.5% |
| TW Taiwan | Restricted | MFDS summary (Korean): ※ 未列於本表中之防腐劑成分，倘歐、美、日三國家地區政府已公告准用且有其限量管制規定者，我國亦依其限用標準准予使用。 倘前述三國家地區政府管理有差異時，則採其中限量規定方式最安全者。 ※ 本表所稱之口腔製劑，包含非藥用牙膏、漱口水類及美白牙齒類等化粧品。 * 단서조항 : ※ 未列於本表中之防腐劑成分，倘歐、美、日三國家地區政府已公告准用且有其限量管制規定者，我國亦依其限用標準准予使用。 倘前述三國家地區政府管理有差異時，則採其中限量規定方式最安全者。 ※ 本表所稱之口腔製劑，包含非藥用牙膏、漱口水類及美白牙齒類等化粧品。 ※ 본 표에 열거되지 않은 방부제 성분은 유럽, 미국,... |
| BR Brazil | Restricted | MFDS summary (Korean): * Restrictions 【Maximum concentration permitted at final product】 : 0.5% * 제한 【완제품에서 허용된 최대 농도】 : 0.5% |
| AR Argentina | Restricted | MFDS summary (Korean): * Restrictions 【Maximum concentration permitted at final product】 : 0.5% * 제한 【완제품에서 허용된 최대 농도】 : 0.5% |
Source: MFDS cosmetic ingredient use restrictions — overseas regulations · checked Oct 17, 2026
DIAZOLIDINYL UREA 디아졸리디닐우레아 디아졸리디닐우레아 (N-(히드록시메칠)-N-(디히드록시메칠-1,3-디옥소-2,5-이미다졸리디닐-4)-N'-(히드록시메칠)우레아)
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 preservative” (EU CosIng — Annex V). The maximum allowed is 0.5%. It is allowed for that use within the stated conditions.
In Korea's MFDS records it is listed as “Restricted” (MFDS — cosmetic ingredient use restrictions). The maximum allowed is 0.50%. A restricted ingredient is allowed within the stated conditions.
In the FDA's records it is listed as “Banned in some U.S. states” (Oregon — Toxic-Free Cosmetics Act (SB 546, Or. Laws 2023 ch. 575)).
The EU's CosIng inventory lists its functions as: preservative.
Korea's MFDS standard Korean name is 디아졸리디닐우레아.
CAS 78491-02-8 (from official records).