# Methenamine

URL: https://app.greenveil.ai/ingredients/ingredient_cas_100_97_0
Categories: beauty, industrial, pharma
Functions: preservative, Adhesion/cohesion promoter, Catalyst, Chemical reaction regulator, Dispersing agent, Preservative
Identifier: 100-97-0

> Methenamine is used as preservative / adhesion/cohesion promoter. Greenveil chemical-concern score: 25/100 — Minor concern based on regulatory listings.. Assessed from 7 sources.

## Safety assessment

- Chemical concern score: 25/100 — Minor concern based on regulatory listings.
- Confidence: 4
- Rationale: Methenamine is listed in Annex V of the EU Cosmetics Regulation (EC) 1223/2009 (preservatives allowed in cosmetic products).

## Regulatory status

- EU: allowed_listed — Annex V of EU Cosmetics Regulation (EC) 1223/2009: preservatives allowed in cosmetic products. Maximum concentration: 0.15%
- US: commercial use observed — EPA CPDat observed this chemical in 225 composition records across product categories including Specialty occupational products, Batteries, Laboratory supplies. EPA CPDat classifies this chemical for functional uses including Preservative, Catalyst, Chemical reaction regulator.
- US: marketed drug occurrence — FDA NDC lists this ingredient in 28 active drug products and 28 total products.
- US: listed in openFDA substance — openFDA substance registry classifies this ingredient as chemical.

_Assessed by Greenveil._