Molecular formula: C16H10N2O2 
Relative molecular weight:262.27(according to the International molecular weight of 1983)
Nature:the appearance is dark blue even grains.It dissolves in hot anilin,but not in water.It turns yellow green when meeting the oil of vitriol.It is yellow in alkaline rongalite revert liquid and white in acidic liquid.
Use: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. 

we offer 
>natural indigo dye 
>natural indigo leaves 
>natural henna powder

 The indigo blue(granular)  Character:

It is wide-used in the world at present because of the good hydrophilic ability,fast dissolving and it has the advantages of less dust,short dissolving time,high coloring rate and in gay colours products comparing to the common powder indigo blue,It is very popular at present. 
Major technical guide Line:
Appearance:dark blue even grains
Contain(%):≥94
Water content(%):≤1
Intension:100
Light and color:similar to the normal product
Iron ion content:≤200ppm 

we can provide Mixed order

we can provide fastest shipment

we can provide 94% purity

we can international standard goods

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