Acid blue 74
CAS 860-22-0
EC 212-728-8
Formula C16H10N2O8S2.2Na
MW 466.35 g/mol
Pigments & Colorants Food & NutritionTextile, Leather & PaperPharmaceuticals & HealthcarePersonal Care & Cosmetics
Description
Acid Blue 74, commonly known as indigotine or E 132 (CI 73015), is a synthetic indigo-derived colorant registered under CAS 860-22-0. It is supplied as a disodium salt and recognised by its characteristic blue-purple hue. Trade references include 1311 Blue and 12070 Blue.
In food and beverage manufacturing, E 132 is used at low concentrations to achieve blue or violet shades in confectionery, beverages, and coatings, where it functions as a water-soluble dye that disperses uniformly in aqueous systems. In pharmaceuticals, it serves as a tablet coating colorant, and in textiles it is applied as a direct dye to natural fibres.
Acid Blue 74 is available in food-grade and technical-grade forms, with compliance documentation available for E 132 (EU food regulations), FCC, and Ph.Eur. standards. The product falls under HS code 32041200 and is subject to REACH registration requirements for industrial supply within the European Economic Area.
In food and beverage manufacturing, E 132 is used at low concentrations to achieve blue or violet shades in confectionery, beverages, and coatings, where it functions as a water-soluble dye that disperses uniformly in aqueous systems. In pharmaceuticals, it serves as a tablet coating colorant, and in textiles it is applied as a direct dye to natural fibres.
Acid Blue 74 is available in food-grade and technical-grade forms, with compliance documentation available for E 132 (EU food regulations), FCC, and Ph.Eur. standards. The product falls under HS code 32041200 and is subject to REACH registration requirements for industrial supply within the European Economic Area.
Physical Properties
| Melting Point | 300 °C |
| Density | 1.01 g/mL at 20 °C |
| Appearance | purple powder |
| Color | Very dark blue to purple |
| Odor | Light odour |
| Form | Powder/Solid |
| Water Solubility | 1 g/100 mL (25 ºC) |
| Refractive Index | n20/D 1.335 |
| pH | 7 (10g/l, H2O, 20℃) |
| Log P | -3.57 |
Trade & Regulatory
| HS Code | 32041200 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 3 |
Other Names
E 132indigotineIndigocarmineIndigotindisulfonate SodiumCI 730151311 BlueC.I. 7301512070 BlueC.I. 75781
Related Products
Raw Materials
Derivatives
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