Products name

Indigo(C.I Vat Blue 1#)

constitutional formula

molecular formula

C*6H*0N2O2

molecular weight

**2

nature

This product is dark-blue uniform powdery or granular. It cannot be dissolved in water and common organic solvents such as ethanol and aether, but can be dissolved in hot aniline and melt phthalic anhydride. Its melting point in the closed capillary is ******2°C, and it begins sublimating slowly at **0°C. It has very good sunburn endurance and application performance.

test condition

HG/T ********6

appearance

dark-blue uniform powder or granule

(1)original powder

content

%≥*4.0

particbe size(*0mesh)

%≥*6.0

moisture

%≤1.0

Fe3+

<**0PPM

(2) pelleting

content

%≥*4.0

moisture

%≤1.0

Fe3+

<**0PPM

(3)Promoter

content

%≥*3.0

moisture

%≤0.8

Fe3+

<**0PPM

use

Reducing indigo to be dyestuff, which can be mainly used in dyeing cotton  fabric, and otherwise can be made to 5.5'*7.7'- tetrabromo indigo, and then be used in biochemical and indicators, etc.