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1-Hexyl 4,5-Diamino Pyrazole Sulfate

Korean: 1-헥실4,5-다이아미노피라졸설페이트 · CAS 1361000-03-4 · Functions: hair dyeing

KR South Korea (MFDS)

No specific rule on file.

EU European Union (CosIng)

Restricted Annex III/300

Conditions: Product type: Hair dye substance in oxidative hair dye products As from 3 September 2017, after mixing under oxidative conditions the maximum concentration applied to hair must not exceed 1,0 %

Required label warning: As from 3 March 2018, to be printed on the label: The mixing ratio. ‘Hair colourants can cause severe allergic reactions. Read and follow instructions. This product is not intended for use on persons under the age of 16. Temporary “black henna” tattoos may increase your risk of allergy. Do not colour your hair if: — you have a rash on your face or sensitive, irritated and damaged scalp, — you have ever experienced any reaction after colouring your hair, — you have experienced a reaction to a temporary “black henna” tattoo in the past.'

Source: EU CosIng — Annex III · checked Oct 17, 2026

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 1-Hexyl 4,5-Diamino Pyrazole Sulfate is treated in 1 more market, from the overseas cosmetic regulation database compiled by Korea's MFDS. Always confirm with the regulator of that country before selling there.

MarketStatusConditions
AS ASEAN (10 countries)Restricted MFDS summary (Korean): * 【Restrictions】 Field of application and/or use : Hair dye substance in oxidative hair dye products Use for dyeing eyelashes and eyebrows is not permitted. * 제한 【사용 범위】 : 산화형 염모제에서 염색 성분 눈썹이나 속눈썹의 염색은 사용금지 * 【Restrictions】 Other limitations and requirements : After mixing under oxidative...

Source: MFDS cosmetic ingredient use restrictions — overseas regulations · checked Oct 17, 2026

Also listed as

1-HEXYL 4,5-DIAMINO PYRAZOLE SULFATE 1-헥실4,5-다이아미노피라졸설페이트

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 1-Hexyl 4,5-Diamino Pyrazole Sulfate banned in the European Union?

In the EU's CosIng records it is listed as “Restricted” (EU CosIng — Annex III). A restricted ingredient is allowed within the stated conditions.

Is 1-Hexyl 4,5-Diamino Pyrazole Sulfate banned in South Korea?

We found no specific rule for it in Korea's MFDS records. That is not an approval or a safety statement.

Is 1-Hexyl 4,5-Diamino Pyrazole Sulfate 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 1-Hexyl 4,5-Diamino Pyrazole Sulfate used for in cosmetics?

The EU's CosIng inventory lists its functions as: hair dyeing.

What is 1-Hexyl 4,5-Diamino Pyrazole Sulfate called on Korean labels?

Korea's MFDS standard Korean name is 1-헥실4,5-다이아미노피라졸설페이트.

What is the CAS number of 1-Hexyl 4,5-Diamino Pyrazole Sulfate?

CAS 1361000-03-4 (from official records).

Ask KBeauty Verified™
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