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Acid Black 2

Acid Black 2 structure

CAS No:
8005-03-6
Formula:
NULL
Chemical Name:
Acid Black 2
Synonyms:
ACID BLACK 2;ACID BLACK;NIGROSINE, WATER SOLUBLE, CERTIFIED, PURE;Nigrosine G;Nigrosine WSJ;Nigrosine (acid black 2);Nigrosine,pure,water soluble;Nigrosine,pure,water soluble, certified
Categories:
Dyes and Pigments > Dye

Description

black crystals or powder

ChEBI: Amido Black 10B is an organic sodium salt resulting from the formal condensation of Amido Black 10B (acid form) with two equivalents of sodium hydroxide. It has a role as a histological dye. It contains a 4-amino-5-hydroxy-3-[(p-nitrophenyl)azo]-6-(phenylazo)-naphthalene-2,7-disulfonate.

Acid Black 2 Basic Attributes

Molecular Weight：

Exact Mass：

616.005920

EC Number：

616-852-7

TSCA：

TSCA listed

Color/Form：

Red-black to black

HScode：

32041200

Characteristics

λmax：

570 nm

PSA：

272.67000

XLogP3：

7.94080

Appearance：

Red-black to black powder

Melting Point：

greater than 662 °F (NTP, 1992)

Water Solubility：

SOLUBLE

Storage Conditions：

Store at RT.

Vapor Pressure：

4.85X10-29 mm Hg at 25 °C (est)

Critical Temperature & Pressure：

Store at RT.

Safety Information

Transport codes：

NONH for all modes of transport

wgk germany：

hazard class code：

Xi,T

safety instructions：

36/37-24/25-24-22-45-53

RTECS Number：

GC4762250

Marks：

Xi,T

Stability/Shelf Life：

Stable. Combustible. Incompatible with strong oxidizing agents.

Precautionary statement(s)：

P201-P280-P333 + P313

Hazard Statements：

43-45

Acid Black 2 Use and Manufacturing

Methods of Manufacturing

Take alcohol-soluble nigrosine as raw material, sulfonate with concentrated sulfuric acid, remove waste acid, wash with water, and neutralize with sodium hydroxide to obtain the product. After filtering and drying, the finished product is obtained. Alcohol-soluble nigrosine (C.I.50415) Preparation method: Nitrobenzene, aniline and aniline hydrochloride are heated together with iron or copper at 180-200℃ to obtain the product. After pickling, washing, filtering and drying, the finished product is obtained. Alternatively, nitrophenol (or nitrocresol), aniline, aniline hydrochloride and a small amount of iron are heated at 180-200°C to obtain the product. After pickling, washing, filtering and drying, the finished product is obtained.

Uses

Biological staining, such as staining of central nervous tissue, pancreatic tissue, cell spores, etc.

It is employed as a common biological stain for tissues and cells. Used to make inks and shoe-polish and for dyeing leather, wood, textiles, and plastics. The crude mixture of nigrosine hydrochlorides (Phenol Black L) is used to dye phenolic resins. Bases are used to make printing colors and to dye plastics. It finds its use in Dorners spore stain, as a negative stain in place of India ink for spirochetes, bacteria, protozoa and fungi. It is also used in compounding resins include phenolic resins, styrenics, polyamides and urea resins.

Material

Sodium hydroxide

Aniline

Sulfuric acid

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Acid Black 2 CAS NO.8005-03-6

CAS No.: 8005-03-6

Grade: Industrial Grade

Content: 99%

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