Korean: 암모늄하이드록사이드 · CAS 1336-21-6 · Functions: buffering, denaturant
No specific rule on file.
Restricted Annex III/4
Maximum: 6% (as NH3)
Conditions: Ammonia
Required label warning: Above 2%: Contains ammonia
Source: EU CosIng — Annex III · checked Oct 17, 2026
No specific rule on file. The FDA regulates few cosmetic ingredients by name; no rule does not mean approval.
How Ammonium Hydroxide is treated in 3 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 |
|---|---|---|
| AS ASEAN (10 countries) | Restricted | MFDS summary (Korean): * 【Restrictions】 Maximum authorised concentration in the finished cosmetic product : 6% calculated as NH3 * 제한 【완제품에서 허용된 최대 농도】 : NH3로서 계산했을 때 6% * Conditions of use and warning which must be printed on the labels : Above 2%: Contains ammonia * 사용 조건 및 포장지에 명시되어야 하는 경고사항 : 위의 2% : 암모니아를 포함한다. |
| BR Brazil | Restricted | MFDS summary (Korean): * Restrictions 【Maximum concentration permitted at final product】 : 6% calculated as NH3 * 제한 【완제품에서 허용된 최대 농도】 : NH3로서 계산했을때 6% * Use conditions and warnings that must appear on the label : Above 2%: contains ammonia * 라벨에 반드시 표기해야 하는 사용 조건 및 주의사항 : 위의 2% : 암모니아를 포함한다. |
| AR Argentina | Restricted | MFDS summary (Korean): * Restrictions 【Maximum concentration permitted at final product】 : 6% calculated as NH3 * 제한 【완제품에서 허용된 최대 농도】 : NH3로서 계산했을때 6% * Use conditions and warnings that must appear on the label : Above 2%: contains ammonia * 라벨에 반드시 표기해야 하는 사용 조건 및 주의사항 : 위의 2% : 암모니아를 포함한다. |
Source: MFDS cosmetic ingredient use restrictions — overseas regulations · checked Oct 17, 2026
AMMONIUM HYDROXIDE 암모늄하이드록사이드
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 “Restricted” (EU CosIng — Annex III). The maximum allowed is 6% (as NH3). A restricted ingredient is allowed within the stated conditions.
We found no specific rule for it in Korea's MFDS records. That is not an approval or a safety statement.
We found no specific rule for it in the FDA's records. That is not an approval or a safety statement.
The EU's CosIng inventory lists its functions as: buffering, denaturant.
Korea's MFDS standard Korean name is 암모늄하이드록사이드.
CAS 1336-21-6 (from official records).