Nigrosine black Acid black 2 appearance is black with shining granules, easily soluble in water and blue-purple, soluble in alcohol and become blue. The acid nigrosine dye is blue in concentrated sulfuric acid, and it becomes purple when diluted to form a precipitate; the aqueous solution is blue-violet, and sodium hydroxide is added to form a dark purple precipitate.

Nigrosine black crystal application:
Mainly used for leather dyeing (generally chromium mordant dyeing). It is also suitable for the dyeing of paper, wood, soap, anodized aluminum, wool and silk fabrics, and can also be used to make ink, shoe polish, etc.

Cangzhou Xincheng Weiye Chemical factory not only produce leather acid black dyes but also red, orange and yellow color. Welcome your inquiry.

Contact person: Miss Jessie Geng

Email:jessie@xcwychem.com

Mobilephone/Whatsapp: +86-13503270825