China wholesale Direct Dyestuff - Hot Sale Direct Fast Black VSF –

Synonyms:C.I. Direct Black 22; 2-Naphthalenesulfonic acid, 6-(2-(2,4-diaminophenyl)diazenyl)-3-(2-(4-((4-(2-(7-(2-(2,4-diaminophenyl)diazenyl)-1-hydroxy-3-sulfo-2-naphthalenyl)diazenyl)phenyl)amino)-3-sulfophenyl)diazenyl)-4-hydroxy-, sodium salt (1:3); C.I. 35435; Direct Black 22; trisodium 6-[(E)-(2,4-diaminophenyl)diazenyl]-3-{(E)-[4-({4-[(E)-{7-[(E)-(2,4-diaminophenyl)diazenyl]-1-hydroxy-3-sulfonatonaphthalen-2-yl}diazenyl]phenyl}amino)-3-sulfonatophenyl]diazenyl}-4-hydroxynaphthalene-2-sulfonate

Appearance:Black powder.

Strength:100%

Solubility:The water solubility is good and the aqueous solution is purple black.Add concentrated lye to make it dark blue and red. It is purple black in concentrated sulfuric acid and produces black brown precipitation after dilution; It is a reddish brown solution in concentrated nitric acid and precipitates. When dyeing, the color light changes slightly in case of copper and iron ions.

Application:mainly used for dyeing and printing of cotton, viscose fabrics and wool viscose and brocade viscose blended fabrics. It is also used for dyeing leather and paper.
Quality guarantee period: 24 months.
Packing: 25kgs iron drum.
Storage:Store in a cool and ventilated room and prevent moisture and heat.