Acid Black 2

TRADE NAME:: Nigrosine Black; Acid Nigrosine; Nigrosine water soluble; Acid Grains Black; Nigrosine Black 2 Nigrosine MS Conc; Water-soluble Nigrosine Black Shoe polish black; Nigrosine W/S; Nigrosine WLL; Nigrosine B; Nigrosine G.HN; Nigrosine K; Nigrosine S; Nigrosine Z; Water Nigrosine SB

CAS NO: 8005-03-6

CI.NO: 50420

Molecular Formula: C22H14N6O9S2-3.2[NA]
Molecular Weight: 616.49
Shade:Black

COLOR TEMPLATE

Acid Black 2 Physical and Chemical properties

SYNONYMS	Nigrosine; C.I. 50420; Nigrosin water soluble; nigrosin cell culture tested; Nigrosin Acid black; Acid Black 5 (50420); Nigrosin
CAS NO	8005-3-6
ANALYSIS RESULT
ITEM	STANDARD	RESULT
Appearance	Black crystal	Black
Moisture	6% max	4.50%
Ash Content	17% max	15.10%
Strength	100%	108%

Colour Fastness Test

Test Methods	fiber	Alkali shrinkage	Acid shrinkage	Seawater discoloration	Soaping discoloration	Sun exposure
ISO	silk	3	4	4	4	5

The appearance is black with glittering particles. Acid Black 2 is soluble in water and blue-violet, soluble in ethanol and blue. The dye is blue in concentrated sulfuric acid, and it is purple after dilution and forms a precipitate. The aqueous solution plus sodium hydroxide has a dark purple precipitate.

Acid Black 2 Application:

mainly used for dyeing leather. It is also suitable for dyeing paper, wood, soap, anodized aluminum, wool, silk, and also for making ink.

Packing:

20 or 25kg/compound bag, carton box, iron drum, fiber durm for powder dye and 1000kg/tank for liquid dye

Acid Black 2 Material Safety Data Sheet (MSDS)

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