Home » Speciality Dyes and Biological Stains » Indigo Carmine Dye
What is Indigo Carmine Dye?
Indigo Carmine or 5,5-indigodisulfonic acid sodium salt is an organic sodium salt formed via formal condensation of indigo carmine (acid form) with two equivalents of sodium hydroxide. It is approved as a colorant to be used in food coloring in the U.S and E.U. to produce a blue color. It has the E number E132.
Macsen Laboratories is the leading manufacturer and supplier of Indigo Carmine dye (food grade) with ISO certification.
| PRODUCT SPECIFICATIONS | |
|---|---|
| Name of Product | Indigo Carmine Dye |
| IUPAC Name | disodium;2-(3-hydroxy-5-sulfonato-1H-indol-2-yl)-3-oxoindole-5-sulfonate |
| Synonyms | Indigotine; 5,5′-indigodisulfonic acid sodium salt; C.I. Acid Blue 74; C.I. Food Blue 1; Indigotindisulfonate sodium; Amacid Brilliant Blue; Ãndigo carmim; Indaco carminio; Carmin indigo |
| CAS No | 860-22-0 |
| Molecular Formula | C16H8N2Na2O8S2 |
| Molecular Weight | 466.4 g/mol |
| Pubchem CID | 2723854 |
| Pubchem SID | 462768915 |
CHEMICAL PROPERTIES
| SR. No | Criteria | Limit/Specification |
|---|---|---|
| 1 | Appearance (form) | Solid Powder or Granules |
| 2 | Appearance (colour) | Dusky, purplish-blue |
| 3 | Total dye content (On as basis) | NLT 85.0 % |
| 4 | Loss on Drying (at 135 °C) | NMT 15.0 % |
| 5 | Water-insoluble matter | NMT 0.2 % |
| 6 | Combined ether extracts | NMT 0.2 % |
| 7 | Subsidiary dyes | NMT 1.0 % |
| 8 | Dye Intermediates | NMT 0.5 % |
| 9 | Lead | NMT 2 ppm |
| 10 | Arsenic | NMT 3 ppm |
| 11 | Mercury | NMT 1 ppm |
| 12 | Cadmium | NMT 1 ppm |
Resources
Food Dyes | An overview of all the dyes currently used in Food
Buy high purity Indigo Carmine Dye from the leading manufacturer with ISO certification. For buying, send us an enquiry-
Other grade available- Indigo Carmine USP
ResourcesÂ
Indigo Carmine | Structure, Properties, Uses & Side effects
Food Dyes | An overview of all the dyes currently used in Food