CheckVegan

Is Disperse Orange 1 vegetarian?

Disperse Orange 1

Vegetarian Vegetarian
Vegan 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

An ingredient is considered vegetarian if it avoids components derived from killing an animal.

Classifications are made to the best of our knowledge based on available scientific and regulatory sources. We cannot guarantee the accuracy of every entry, errors in the sources we draw from can always occur. This tool also cannot account for cross-contamination, which depends entirely on individual suppliers and producers. If you believe a classification is incorrect, you can report an issue.

Report an issue