Is Disperse Orange 1 vegan?

Disperse Orange 1

Vegan

Disperse Orange 1 is a synthetic azo disperse dye used for dyeing polyester and other hydrophobic synthetic fibres. It is a polar molecule containing an azo group and is slightly soluble in water. It is applied from aqueous suspension in dyeing processes.

Also known as 4-Anilino-4'-nitroazobenzene
CAS number 2581-69-3
EC number 219-954-4
CI number CI 11080
Last reviewed 3 June 2026

Sources

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