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Annex III Entry 300 27/07/2020

1-HEXYL 4,5-DIAMINO PYRAZOLE SULFATE

1H-Pyrazole-4,5- diamine, 1-hexyl-, sulfate (2:1)

1-HEXYL 4,5-DIAMINO PYRAZOLE SULFATE is listed in Annex III and may only be used under the conditions shown in this record.

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Restricted substance— Annex III, EU Regulation 1223/2009
Entry: 300

Record details

Product type

Hair dye substance in oxidative hair dye products

Other restrictions

As from 3 September 2017, after mixing under oxidative conditions the maximum concentration applied to hair must not exceed 1,0 %

Warnings

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.'

INCI glossary name

1-HEXYL 4,5-DIAMINO PYRAZOLE SULFATE

Chemical name

1H-Pyrazole-4,5- diamine, 1-hexyl-, sulfate (2:1)

Chemical / IUPAC name

1H-Pyrazole-4,5- diamine, 1-hexyl-, sulfate (2:1)

Regulatory information

Regulation

(EU) 2017/237

Key data

CAS
1361000-03-4
EC
—
Annex
III
Entry number
300

Inventory links for 1-HEXYL 4,5-DIAMINO PYRAZOLE SULFATE

Annex III 16
Shared product type

1-NAPHTHOL

CAS: 90-15-3
EC: 201-969-4
Annex III 16
Shared product type

1-Naphthol

CAS: 90-15-3
EC: 201-969-4
Annex III 193
Shared product type

ACID RED 52

CAS: 3520-42-1
EC: 222-529-8

What Annex III means for 1-HEXYL 4,5-DIAMINO PYRAZOLE SULFATE

1-HEXYL 4,5-DIAMINO PYRAZOLE SULFATE is a restricted substance under Annex III of EU Cosmetics Regulation 1223/2009. Its use in cosmetics is only permitted under the specific conditions set out in the entry above, including applicable concentration limits, product type restrictions and required warning statements.

When including this substance in a formulation, all conditions — maximum concentration, product scope and warning labels — must be met simultaneously. Compliance with one condition does not override the others.

This record is linked to 2 CosIng inventory ingredients for name and identifier cross-reference. The page also surfaces 12 related annex records with overlapping identifiers, annex logic or naming patterns.

Compliance checklist

  • Confirm product type compatibility: Hair dye substance in oxidative hair dye products
  • Include required warning statement on product label.
  • Document conditions of use in the Product Information File (PIF).

Frequently asked questions

1-HEXYL 4,5-DIAMINO PYRAZOLE SULFATE is listed in Annex III of EU Regulation 1223/2009 as a restricted substance. It may only be used under the conditions specified in the entry, including any maximum concentration, product type limitation and required warning statements shown above.

CAS 1361000-03-4 is the unique numerical identifier assigned to 1-HEXYL 4,5-DIAMINO PYRAZOLE SULFATE by the Chemical Abstracts Service. In cosmetic compliance work, the CAS number is used to cross-reference the substance across regulatory databases, raw material specifications and safety assessment reports. Multiple EU annex entries may share the same CAS number if the same substance appears under different conditions or in different annexes.

Use the INCI Checker tool on this site to paste your full ingredient list (INCI) and scan it against all Annex II–VI entries. The tool highlights any ingredients that match restricted, prohibited or allergen-flagged records. This is useful for rapid compliance screening of finished product formulas or raw material declarations.
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Source note for Annex III record 1-HEXYL 4,5-DIAMINO PYRAZOLE SULFATE

This page summarizes one Annex III record for 1-HEXYL 4,5-DIAMINO PYRAZOLE SULFATE from public European Commission cosmetic materials and adds linked inventory or identifier matches when available.

Use this record page to review Annex III conditions for 1-HEXYL 4,5-DIAMINO PYRAZOLE SULFATE, but confirm any final regulatory decision against the current official annex wording and source files.

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