Indigo

Alias: Vat Indigo
Colour Index: C.I. Vat Blue 1 (73000)
CAS No.: 482-89-3
Molecular Formula: C₁₆H₁₀O₂N₂
Molecular Weight: 262.27
Chemical Name: 3,3'-dioxobiindoline

Note: Packaging can be customized as customer request.

Indigo Powder

Properties & Application:
Acid washed indigo powder is refined from regular indigo. It features low iron content, fewer impurities and high purity. The reduced liquor is clear and transparent. It delivers brighter shade when dyeing cotton fabrics compared with standard indigo.

Main Specifications:

Item	Specification
Purity	≥96.0%
Shade	Approximate to standard sample
Iron	≤200PPM
Moisture	≤1.0%
Strength	100% of standard sample
Fineness	≥95% passing 60 mesh
pH	7
Appearance	Dark blue uniform powder

Note: Packaging can be customized as customer request.

Granular Indigo

Properties & Application:
Indigo granular is produced by adding auxiliaries to acid washed indigo slurry and spray drying. Low dust, good flowability for automatic feeding. Excellent wetting and dispersion, anti-caking. Stable storage, low moisture absorption, static-free. Uniform dyed fabric and bright shade.

Main Specifications:

Item	Specification
Purity	≥93.0%, 94.0%
Shade	Approximate to standard sample
Iron	≤300PPM
Moisture	≤1.0%
Strength	100% of standard sample
pH	8-9
Appearance	Dark blue granules

Note: Packaging can be customized as customer request.