Name – Indigo Carmine
Classification – C.I No.-73015/E132/F.D&C BLUE 2/Indigotine/C.I. FOOD BLUE 1/I.S.1698
No.CharacteristicRequirement
DescriptionReddish Blue Powder
1Total colour/Assay, percent by Mass, min.85.00
2Water-insoluble matter, percent by mass, Max.00.20
3Combined ether extracts, percent by mass, Max.00.20
4Subsidiary dyes, percent by mass, Max.02.00
5Dye intermediates, percent by mass, max.
• Isatin sulphanic acid,
• 5- Sulfoanthranilic acid00.50