Fragrance avoidance
No fragrance-linked caution surfaced in the current profile.
This ingredient does not currently read as a fragrance-linked driver in the published evidence and hazard profile.
- beauty
4,5-Diamino-1-(2-hydroxyethyl)pyrazole sulfate
CAS 155601-30-2 · 70/100 · High conf.
Dye
Concern score
70/100High concern based on regulatory listings.
Well researched
Why it's flagged
4,5-Diamino-1-(2- hydroxyethyl)-1H- pyrazole is restricted in cosmetic products under Annex III of the EU Cosmetics Regulation (EC) 1223/2009.
RestrictedEU EC — restricted
The score describes this ingredient's chemical identity — its hazard profile from published classifications and regulatory status — not the safety of any product it appears in.
Regulation
Restrictions first, then routine listings from published regulatory sources.
- commercial_presence
- consumer_product_presence
- cpdat_category:beauty
- definition_level:complete
- definition_type:primary
- eu_annex:III
- eu_cosmetic_restricted
- ingredient_type:ingredient substance
- View source →restricted
EUEC
Annex III of EU Cosmetics Regulation (EC) 1223/2009: substances which cosmetic products must not contain except subject to the restrictions laid down. Product types: Hair dye substance in oxidative hair dye products Other conditions: After mixing under oxidative conditions the maximum concentration applied to hair must not exceed 3,0 % Conditions of use and warnings: To be printed on the label: The mixing ratio. Hair colorants 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…
USEPAcommercial use observedEPA CPDat observed this chemical in 28 composition records across product categories including Personal care. EPA CPDat classifies this chemical for functional uses including Dye.
- EPA CPDat observed this chemical in 28 composition records across product categories including Personal care. EPA CPDat classifies this chemical for functional uses including Dye.Source →
USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
- openFDA substance registry classifies this ingredient as chemical.Source →
Evidence
No graded sources yet for 4,5-Diamino-1-(2-hydroxyethyl)pyrazole sulfate. We publish evidence only once a source is linked and reviewed — this ingredient is in the catalog, but has not been assessed.
Suitability
Context-specific fit derived from published classifications and the current ingredient evidence profile.
Good fit
Where it appears
Prevalence of 4,5-Diamino-1-(2-hydroxyethyl)pyrazole sulfate in our catalog (epa_cpdat).
Products
28
Brands
2
Personal care
Typical roles
Dye
