Basic Info.
Product Description
1.Indigo Blue Powder or Granular 94%
1)We are the biggest manufacturer of disperse dyes,the second biggest manufacturer of reeactive dyes and sodium hydrosulfite, and specializing in manufacture of indigo blue,sulphur black, vat dyes, basic dyes, direct dyes and OBA
2.Indigo BLue (Vat Blue dyes)
Molecular Formula: C16H10N2O2
Colour Index: C.I. Vat Blue 1
Cas No. 482-89-3
Composion: Phenylethane acid potassium salt reacts to amino sodium through alkali fusion, and then oxidized.
Appearance: Dark blue even Granular and Powder
Strength:94%
Shade: To the similar standard of the factory
Moisture%:0.45 Max
Particle size(-60 mesh)%: 95
Fe3:200ppm Max
3.Properties of indigo:
It is insoluble in water and alcohol.It is soluble in hot Aniline.
4.Detailed informations of indigo as following:
Cas No. | 482-89-3 |
Colour Index | Vat Blue 1 |
Appearance | Dark blue,Powder,Granular |
Colour light | Similar as the standard sample |
Content | ≥93.0%,94.0% |
Moisture content | ≤1.0% |
Strength | Equal to 100 percent of the standard sample |
PH Range | 9.5-10.5 |
Content of ferric ions | ≤200PPM |
Properties | It is insoluble in water and alcohol.It is soluble in hot Aniline |
5.Use of indigo:
It is mainly used to dye cotton fibre .The pop "cowboy" clothes mostly are made by indigo blue dying longitudinal yarn and white yarn interweaving;It can be used with sulfurated coloring matter;Also we can get indigo white,bromized indigo blue from it,they are well used in food coloring matter,biochemistry etc. 
6.Packages of indigo:
25KG Plastic-Woven Bag with double polyester liner
20KG Carton with double polyester liner
20KG/15KG Iron Drum with double polyester liner
