NIGROSIN, WATER SOLUBLE

PRODUCT IDENTIFICATION

CAS NO. 8005-03-6

 

EINECS NO.

not listed

FORMULA C22H14N6Na2O9S2
MOL WT. 616.49
H.S. CODE  
TOXICITY  
SYNONYMS C.I. Acid Black 2; C.I. 50420; biological stain;
Nigrosinre ms crystal; Nigrosine powder w.s.; Nigrosin; Acid grain black;

CHEMICAL FAMILY

Aniline derivatives

CLASSIFICATION

Acid Dye

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE

black powder

MELTING POINT 275 C
BOILING POINT  
SPECIFIC GRAVITY  
SOLUBILITY IN WATER Soluble
AUTOIGNITION  
pH  
VAPOR DENSITY  
NFPA RATINGS Health: 1; Flammability: 0; Reactivity: 0

REFRACTIVE INDEX

 
FLASH POINT

 

STABILITY Stable under ordinary conditions

GENERAL DESCRIPTION & APPLICATIONS

Nigrosine is a dark black pigment (or dye), obtained primarily from aniline. There are three kinds: water-, alcohol- (spirit-), or oil- soluble.

Nigrosin

Color Index

CAS RN

Nigrosin water soluble Acid black 2 8005-03-6
Nigrosin oil soluble Solvent Black 7 8005-02-5
Nigrosin alcohol soluble Solvent Black 5 11099-03-9

Nigrosine is used in dying of leather, wood and textiles. It is used in the manufacture of ink, shoe polish cream, carbon paper and toners.. It is also used in compounding resins include phenolic resins, styrenics, polyamides and  urea resins. Nigrosin is acidic. Stain grade is used for negative cell staining. Rather than regular base stains like methylene blue or carbol fuchsin it has a special affinity for ganglion cells. Picric acid, Eosin, Nigrosin Acidic stains include Picric acid, Eosin, Nigrosin. Picronigrosin is a solution of nigrosin and picric acid in alcohol for staining use. Other applications are in cosmetics, indicators  and colour smoke.

SALES SPECIFICATION

APPEARANCE

black powder

WATER

6.0% max

WATER INSOLUBLE

0.3% max

PARTICLE SIZE

80 mesh

pH

9.0 - 10.0

ASH

17.0% max

TRANSPORTATION
PACKING 25kgs in bag or fiber drum
HAZARD CLASS This compound is in the EPA inventory under TSCA.
UN NO.

not regulated

PRICE INFORMATION