# Guanine

URL: https://app.greenveil.ai/ingredients/ingredient_cas_73_40_5
Categories: beauty, industrial
Functions: colorant, Dye, Opacifer
Identifier: 73-40-5

> Guanine is used as colorant / dye. Greenveil chemical-concern score: 25/100 — Minor concern based on regulatory listings.. Assessed from 6 sources.

## Safety assessment

- Chemical concern score: 25/100 — Minor concern based on regulatory listings.
- Confidence: 4
- Rationale: 2-Amino-1,7-dihydro-6H-purin-6-one is listed in Annex IV of the EU Cosmetics Regulation (EC) 1223/2009 (colorants allowed in cosmetic products).

## Regulatory status

- EU: allowed_listed — Annex IV of EU Cosmetics Regulation (EC) 1223/2009: colorants allowed in cosmetic products.
- US: commercial use observed — EPA CPDat observed this chemical in 73 composition records across product categories including Laboratory supplies, Construction, Personal care. EPA CPDat classifies this chemical for functional uses including Dye, Opacifer.
- US: listed in openFDA substance — openFDA substance registry classifies this ingredient as chemical.

_Assessed by Greenveil._