Indigo carmine is a synthetic food colouring dye that also functions as a pH indicator, changing from blue to yellow at pH 11. 5-14.
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Tripotassium citrate
food additive sequestrant stabilizer buffer
Sodium pantothenate
nutritional supplement and vitamin
Potassium L-hydrogentartrate
food acidity regulator and raising agent
Disodium L-tartrate
Food emulsifier and sequestrant
Pigment Blue 63
Food colorant lake pigment
Indigo
blue vat dye
5,5',7,7'-tetrabromoindigo
Vat dye for textiles
The international HS code for Indigo carmine (CAS 860-22-0) is 3204.12.
3204.12
3204 12 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
disodium;2-(3-hydroxy-5-sulfonato-1H-indol-2-yl)-3-oxoindole-5-sulfonate
JFVXEJADITYJHK-UHFFFAOYSA-L
C1=CC2=C(C=C1S(=O)(=O)[O-])C(=C(N2)C3=NC4=C(C3=O)C=C(C=C4)S(=O)(=O)[O-])O.[Na+].[Na+]
Sourcing Indigo carmine?
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