CI 42520 is graded A** (Safe) by Expert·ING, based on COSING regulatory data.

CI 42520

Acid Blue 9

Safety grade: A**

This colorant is permitted in EU cosmetics but restricted to certain product types or conditions of use under EU Cosmetics Regulation (EC) No 1223/2009. To be sold legally in the EU or UK, a product must meet these conditions.

This ingredient is used as a cosmetic colorant to impart blue or blue-toned colors to makeup, skincare, and personal care products.

Graded using: COSING.

EU COSING — Permitted

Last verified: June 9, 2026

Other Cosmetic Colorant ingredients

CI 19140 — Grade A
CI 42090 — Grade A
CI 77891 — Grade A**
CI 77492 — Grade A
CI 17200 — Grade C
CI 77491 — Grade A
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CI 15985 — Grade A