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© 2026 Dermasift. All rights reserved.

For informational purposes only — not medical advice. Always consult a dermatologist for skin concerns.

BASIC RED 51

1% line markerAI-analyzed

hair colorant

What it does

A synthetic basic dye used in hair coloring formulations to impart red tones.

Skin Concerns

May aggravate

sensitivity

Safety & Science

Safety summary

Generally safe for use in hair dyes within regulatory limits. Potential for skin irritation or allergic reactions in sensitive individuals.

CAS Number

77061-58-6

1% line marker

This ingredient is commonly used as a marker to identify where ingredients drop below 1% concentration on the label.

Found In Products

Related Ingredients

At a Glance

INCI Name: BASIC RED 51
Functions: hair colorant
Products: 6 products
CAS Number: 77061-58-6

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

BASIC RED 51 — Skincare Ingredient Guide — Dermasift — Dermasift