Korean: 쿼터늄-15 · CAS 51229-78-8 · Functions: antimicrobial, preservative
Restricted MFDS restricted ingredients
Maximum: 0.20%
Conditions (official MFDS text, Korean):
* 배합한도 : 0.20%
Source: MFDS — cosmetic ingredient use restrictions · checked Oct 17, 2026
Prohibited Annex II/1385
Source: EU CosIng — Annex II · 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
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 VA-HB122
Conditions: Virginia: Toxin-Free Cosmetics (HB 122, 2026 Acts ch. 910) · Va. Code §59.1-574.2 · In force since 2026-07-01 · intentionally added
Source: Virginia — Toxin-Free Cosmetics (HB 122, 2026 Acts ch. 910) · checked Oct 17, 2026
Banned in some U.S. states CA-TFCA
Conditions: California: Toxic-Free Cosmetics Act (AB 2762, Ch. 314, Stats. 2020), as amended by AB 496 (Ch. 441, Stats. 2023), AB 60 'Musk Reduction Act' (Ch. 432, Stats. 2025) and SB 39 (Ch. 208, Stats. 2025) · Cal. Health & Safety Code §108980 (subd. (a) 2025 list; (b) 2027 list; (c) musk ketone; (d) trace exemption; (f) boric acid suppositories) · In force since 2025-01-01 · intentionally added
Source: California — Toxic-Free Cosmetics Act (AB 2762, Ch. 314, Stats. 2020), as amended by AB 496 ( · checked Oct 17, 2026
Banned in some U.S. states VT-ACT131
Conditions: Vermont: Act 131 of 2024 (S.25) — Chemicals in Cosmetic and Menstrual Products · 9 V.S.A. §2494b · In force since 2026-01-01 · intentionally added
Source: Vermont — Act 131 of 2024 (S.25) — Chemicals in Cosmetic and Menstrual Products · checked Oct 17, 2026
Banned in some U.S. states MD-HB643
Conditions: Maryland: Public Health - Cosmetic Products - Ingredient Prohibition (HB 643, Chapter 490, Laws of Maryland 2021) · Md. Code, Health-General §21-259.2 · In force since 2025-01-01 · intentionally added (knowingly)
Source: Maryland — Public Health - Cosmetic Products - Ingredient Prohibition (HB 643, Chapter 490, · checked Oct 17, 2026
Banned in some U.S. states IL-PA104-0545
Conditions: Illinois: Chemicals in Cosmetic Products Act (HB 3409, Public Act 104-0545) · Public Act 104-0545 §15 · From 2028-07-01 · intentionally added
Source: Illinois — Chemicals in Cosmetic Products Act (HB 3409, Public Act 104-0545) · checked Oct 17, 2026
How Quaternium-15 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 | — |
| AS ASEAN (10 countries) | Restricted | MFDS summary (Korean): * 【Restrictions】 Maximum authorised concentration in the finished cosmetic product : 0.2% * 제한 【완제품에서 허용된 최대 농도】 : 0.2% if benzene is technically unavoidable to be present in cosmetics as an impurity, its limit should not exceed 2mg/kg. |
| 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 | — |
| AR Argentina | Restricted | — |
Source: MFDS cosmetic ingredient use restrictions — overseas regulations · checked Oct 17, 2026
QUATERNIUM-15 쿼터늄-15
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 “Prohibited” (EU CosIng — Annex II).
In Korea's MFDS records it is listed as “Restricted” (MFDS — cosmetic ingredient use restrictions). The maximum allowed is 0.20%. A restricted ingredient is allowed within the stated conditions.
In the FDA's records it is listed as “Banned in some U.S. states” (Washington — Toxic-Free Cosmetics Act (Substitute House Bill 1047, Chapter 455, Laws of 2023)).
The EU's CosIng inventory lists its functions as: antimicrobial, preservative.
Korea's MFDS standard Korean name is 쿼터늄-15.
CAS 51229-78-8 (from official records).