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ACID RED 26

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ACID RED 26 Basic information

Product Name:
ACID RED 26
Synonyms:
  • (4E)-4-[(2,4-dimethylphenyl)hydrazinylidene]-3-oxonaphthalene-2,7-disulfonate
  • xylidineponceau3rs
  • ACID RED 26
  • ACID RED 26 CI 16150
  • ACID SCARLET 2R
  • 4-(2,4-DIMETHYLPHENYLAZO)-3-HYDROXY-2,7-NAPHTHALENEDISULFONIC ACID, DISODIUM SALT
  • disodium 1-(2,4-dimethylphenylazo)-2-hydroxynaphthalene-3,6-disulphonate
  • Ponceau red RR
CAS:
3761-53-3
MF:
C18H14N2Na2O7S2
MW:
480.42
EINECS:
223-178-3
Product Categories:
  • Organics
Mol File:
3761-53-3.mol
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ACID RED 26 Chemical Properties

Melting point:
>300℃
Colour Index 
16150
form 
Fine Powder
color 
Dark red to bordeaux
BRN 
5709350
IARC
2B (Vol. 8, Sup 7) 1987
EPA Substance Registry System
C.I. Food Red 5 (3761-53-3)
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Safety Information

Hazard Codes 
Xn,T
Risk Statements 
40-45-36/37/38
Safety Statements 
36-53-45-36/37/39-26
WGK Germany 
3
RTECS 
QJ6825000
HS Code 
32041200

MSDS

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ACID RED 26 Usage And Synthesis

Chemical Properties

dark red to bordeaux fine powder

Uses

A stain used in histology and in Masson’s trichrome stain.

Definition

ChEBI: An organic sodium salt that is the disodium salt of 4-[(2,4-dimethylphenyl)diazenyl]-3-hydroxynaphthalene-2,7-disulfonic acid. Its use is largely confined to Masson's trichrome, where it gives a slight orange shading to the red of the cytoplasmic structure .

General Description

Dark red crystals or red powder.

Air & Water Reactions

Azo dyes can be explosive when suspended in air at specific concentrations. Slightly soluble in water.

Reactivity Profile

ACID RED 26 is an azo compound. Azo, diazo, azido compounds can detonate. This applies in particular to organic azides that have been sensitized by the addition of metal salts or strong acids. Toxic gases are formed by mixing materials of this class with acids, aldehydes, amides, carbamates, cyanides, inorganic fluorides, halogenated organics, isocyanates, ketones, metals, nitrides, peroxides, phenols, epoxides, acyl halides, and strong oxidizing or reducing agents. Flammable gases are formed by mixing materials in this group with alkali metals. Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides. ACID RED 26 is incompatible with strong oxidizing agents and strong acids .

Fire Hazard

Flash point data for ACID RED 26 are not available; however, ACID RED 26 is probably combustible.

Safety Profile

Moderately toxic by intraperitoneal route. Questionable carcinogen with experimental carcinogenic and tumorigenic data. Mutation data reported. When heated to decomposition it emits toxic fumes of NOx and SOx.

ACID RED 26Supplier

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