# Benzenesulfonic acid, 3,3′-[sulfonylbis[(2-nitro-4,1-phenylene)imino]]bis[6-(phenylamino)-, sodium salt (1:2)

URL: https://app.greenveil.ai/ingredients/ingredient_cas_6373_79_1
Categories: beauty, industrial
Functions: Dye
Identifier: 6373-79-1

> Benzenesulfonic acid, 3,3′-[sulfonylbis[(2-nitro-4,1-phenylene)imino]]bis[6-(phenylamino)-, sodium salt (1:2) is used as dye. Greenveil chemical-concern score: 100/100 — Critical concern based on regulatory listings.. Assessed from 3 sources.

## Safety assessment

- Chemical concern score: 100/100 — Critical concern based on regulatory listings.
- Confidence: 4
- Rationale: 3,3'-(Sulfonylbis(2-nitro-4,1-phenylene)imino)bis(6-(phenylamino))benzenesulfonic acid and its salts, when used as a substance in hair dye products 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 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Dye.

_Assessed by Greenveil._