indigo
Molecular formula: C16H10O2N2Molecular weight: 262.26
Use: as raw material, reduced indigo is mainly used in cotton yarn, cotton cloth, wool or silk. The pure product can be used to produce food dyes. And it can also be used to produce 5.5'-7.7'-tetrabromo indogo, and used in biochemical medicament and indicator.
Technical conditions: execute HG/T2750- 1996
Apperance: dark blue uniform powder Assay % (oxo process): >=94Fineness %(60mesh): >=95Water content %: <=1.0Iron ions: 300ppm
Indigo Blue (Indigo) There are three specifications: the original powder, wettable powder, granular wettable powder, the appearance of dark blue and dark blue powder of two particles. Case of heat to 170 degrees when into a distillation of purple gas, do not break down, do not dissolve in water, alcohol, soluble in hot aniline solution. In the concentrated sulfuric acid in the yellow light was green, blue diluted precipitation, after the restore basic hidden lanes are light yellow color. For cotton fiber and fabric dyeing, popular at home and abroad, "jeans" Most of the fabrics from indigo dyeing warp and white woven together. Can also be dyed wool and silk, carpets and handicrafts also have applications.
Appearance: dark blue uniform particles
Shade: Approximate Standard
Strength: ≥ 100 points
Content: ≥ 94.0%
Moisture: ≤ 1.0%
Iron content: ≤ 100PPM
Proliferation: a
Reduction of cold: ≤ 90 minutes
Wettability: ≤ 2s
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