# 4-tert-Butylcatechol

URL: https://app.greenveil.ai/ingredients/ingredient_cas_98_29_3
Categories: beauty, industrial
Functions: Fragrance, polymerization initiators / inhibitors / catalysts>inhibitors
Identifier: 98-29-3

> 4-tert-Butylcatechol is used as fragrance / polymerization initiators / inhibitors / catalysts>inhibitors. 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-Butylpyrocatechol 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 11 composition records across product categories including Laboratory supplies, Specialty occupational products, Raw materials. EPA CPDat classifies this chemical for functional uses including Fragrance, polymerization initiators / inhibitors / catalysts>inhibitors.
- US: listed in openFDA substance — openFDA substance registry classifies this ingredient as chemical.

_Assessed by Greenveil._