Basic Info.
Product Description
94% dark Indigo blue for Textile Dyestuffs materials
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.Specification of Indigo blue 94%
| Products name | Indigo(C.I Vat Blue 1#) |
| molecular formula | C16H10N2O2 |
| molecular weight | 262 |
| test condition | HG/T 2750-1996 |
| appearance | dark-blue uniform powder or granule |
| (1)original powder | |
| content | %≥94.0 |
| particbe size(60mesh) | %≥96.0 |
| moisture | %≤1.0 |
| Fe3+ | <200PPM |
| (2) pelleting | |
| content | %≥94.0 |
| moisture | %≤1.0 |
| Fe3+ | <200PPM |
| (3)Promoter | |
| content | %≥93.0 |
| moisture | %≤0.8 |
| Fe3+ | <200PPM |
5.Package
25KG Plastic-Woven Bag with double polyester liner
6.Storage & Transportation
The product must be stored in shade, dry & well-ventilated warehouse. Avoid to be contacted with oxidizing chemicals and combustible organic substances. Keep it away from direct sunlight, heat, sparks and open flames. Carefully handle the product and avoid damaging the package.