ACID BLUE 9

Acid Blue 9 is classed chemically as a triphenylmethane colour. It conforms to the formula:

ACID BLUE 9 is listed in the European Commission CosIng inventory under the functional category Hair Dyeing, with CAS number 3844-45-9 and EC number 223-339-8. CosIng records a restriction against it (III/190), so check the corresponding Annex entry before formulating. In the free INCIDB sample it appears on 1 product label, reaching position 21 on John Frieda Violet Crush Toning Shampoo 250mL.

Sample products containing ACID BLUE 9

Label positions from the free INCIDB sample. A lower position means the ingredient is declared earlier, i.e. present in a higher proportion.

Query ACID BLUE 9 in the full snapshot

import pyarrow.parquet as pq

ingredients = pq.read_table('ingredients.parquet').to_pandas()
target = ingredients[ingredients['inci_name'] == "ACID BLUE 9"]
print(target[['ingredient_id', 'functions', 'cas_number', 'is_common_allergen']])

The complete snapshot covers 18,583 products. Coverage of each enrichment column is published, both per distinct name and weighted by label occurrence — see the coverage table.