Product name:C.I. Acid Black 2; Nigrosine; C.I. 50420; Nigrosin water soluble; Nigrosin Acid black; Acid Black 5 (50420)

Physical and chemical properties
Solubility: Soluble in water
Form:Crystals or powder
Water solubility: soluble in water, the aqueous solution appears blue purple, and the addition of sodium hydroxide solution produces a brownish purple precipitate.
Solubility: Soluble in ethanol and turns blue. It also turns blue in sulfuric acid and turns purple after dilution, with precipitation.

Acid nigrosine black usage

Usage 1: Mainly used for dyeing wool and silk, as well as for dyeing leather (usually chrome), as well as for coloring paper, wood products, soap, aluminum carbide, and manufacturing ink.

Usage 2: Mainly used for dyeing leather, silk, and woolen fabrics, and can also be made into color lakes for coloring paper and printing.

Cangzhou Xincheng Weiye Chemical Co., Ltd is specialized in manufacturing various kinds of acid dyes, such as acid black 2, acid orange 7, acid red 18, acid blue 9, acid yellow 36 etc. Welcome your inquiry.

Contact person: Miss Jessie Geng

Email:jessie@xcwychem.com

Mobilephone/Whatsapp: +86-13503270825