Acid Black 1

AI-analyzed

INCI: CI 27755

colorant

What it does

This ingredient is a synthetic organic dye used to impart a black color to cosmetic products, often found in eyeliners, mascaras, and hair dyes.

May aggravate

sensitivity

Safety summary

Generally considered safe for use as a cosmetic colorant.

CAS Number

2118-39-0

For informational purposes only. This is not medical advice. Always patch test new products and consult a dermatologist for skin concerns.