Dynasul Liquid dyes are environmental-friendly liquid sulfuration dyes

1. Molecular formula: C6H4N2O5
2. Molecular weight: 184.11
3. Structure formula:

4. CAS NO.:1326-82-5
5. Appearance: Black liquid.
6. Specification: Strength 200% 
7. Usage: Mainly used in dyeing of leather.
8. Packing, storage and transportation: Packed with 1000KG IBC TANK, allows to be tansported by the general means.

green black and blue black. Black uniform powder. Insoluble in water and Etanol. In the Sodium sulfide solution solubility is good, for green black; Add Sodium hydroxide and Sodium sulfide solution of colour and lustre is blue; Add hydrochloric acid Sodium sulfide solution to have green black precipitation; In the cold part of concentrated sulfuric acid solution, after heating for deep green light blue, further heating into dark blue; In 25% of fuming sulfuric acid for black blue, dilution after green black precipitation. Dyeing content in alkaline insurance powder solution for yellow olive, after oxidation can restore the original colour and lustre; In Sodium hypochlorite solution all fade, join concentrated sulfuric acid no effect. Mainly used for cotton, vinylon/cotton blended fabric dyeing, and can also be used to hemp, viscose fiber dyeing.

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