Sulphur Black

1)Sulphur Black 1326-82-5

2)MF: C6H4N2O5 EINECS No.: 215-444-2 CAS No.: 1326-82-5 

3)Characteristics and applications

Bright black flake-granulars. It is slightly insoluble in water. It is soluble in sodium sulfide with a green-black colour.

Dinitrochlorbenzne by hydrolysis then sulfurates with sodium polysulfide,and then oxidized.

4)Storage / transportion

It must be store in drying and ventilation preventing from sunlight directly, moisture or hot. Must be care with it and prevent from damaging the packing.

5)Usage

Sulfur dyes are the most commonly used dyes manufactured for cotton in terms of volume. They are cheap, generally have good wash-fastness and are easy to apply. The dyes are absorbed by cotton from a bath containing sodium sulfide or sodium hydrosulfite and are made insoluble within the fiber by oxidation. During this process these dyes form complex larger molecules which is the basis of their good wash-fastness.

6)Package ;25kg/pp bag, 20MT/20'FCL

7)Description

Insoluble in water, ethanol. Soluble in zinc sulfide colloid solution is green; In a green light black hydrochloric acid deposition; Sodium hydroxide solution in a blue; In a cold sulfuric acid when dissolved, heating become dark green light blue precipitation, continue to heat into black and blue, green light blue after diluted produce precipitation. Dyeing objects in the alkaline solution in an insurance powder yellow olive, and oxidation to recover original colour and lustre; Sodium hypochlorite solution in all fade.

8)Please conttact us if you need the product. EMAIL:brucelee(at)shlchem(dot)com