Vat Orange 1 is an orange-hue synthetic anthraquinone vat dye. It is prepared by dibromination of Dibenzpyrenequinone, also known as Vat Yellow 4. References External links More about Vat Orange 1 in chemical book More about Vat Orange 1 in Online Database of Chemicals from Around the World Anthraquinone dyes Vat dyes Bromoarenes Hexacyclic compounds