# 4-tert-Butylphenol

URL: https://app.greenveil.ai/ingredients/ingredient_cas_98_54_4
Categories: beauty, industrial
Functions: aminoplastes / phenoplastes (uf, muf), Antioxidant, Binder, Catalyst, Flavouring and nutrient, Hardener, polymerization initiators / inhibitors / catalysts>polymerization inhibitors, reactive hardener and plasticizer, Solvent
Identifier: 98-54-4

> 4-tert-Butylphenol is used as aminoplastes / phenoplastes (uf, muf) / antioxidant. Greenveil chemical-concern score: 100/100 — Critical concern based on regulatory listings.. Assessed from 6 sources.

## Safety assessment

- Chemical concern score: 100/100 — Critical concern based on regulatory listings.
- Confidence: 4
- Rationale: 4-tert-Butylphenol is prohibited in cosmetic products under Annex II of the EU Cosmetics Regulation (EC) 1223/2009.

## Regulatory status

- EU: banned — Annex II of EU Cosmetics Regulation (EC) 1223/2009: substances prohibited in cosmetic products.
- US: commercial use observed — EPA CPDat observed this chemical in 43 composition records across product categories including Raw materials, Construction, Laboratory supplies. EPA CPDat classifies this chemical for functional uses including Flavouring and nutrient, Binder, Hardener.
- US: listed in openFDA substance — openFDA substance registry classifies this ingredient as chemical.

_Assessed by Greenveil._