PONCEAU S

Synonyms. Ponceau S; C.I. Acid Red 112 tetrasodium salt; Tetrasodium 3-hydroxy-4-(2-sulphonato-4- (4-sulphonatophenylazo) phenylazo) naphthalene- 2,7-disulphonate; 2-Hydroxy-1-((4((4-sulfophenyl )azo)-2-sulfophenyl) azo)naphthalene-3,6-disulfonic acid tetrasodium salt; C.I. 27195; C.I. Acid Red 112; Ponceau Red S; 3-Hydroxy-4-[2-sulfo-4-(4-sulfophenylazo)phenylazo]-2,7-naphthalenedisulfonic acid tetrasodium salt;

PONCEAU S

Click for original image

 

PRODUCT IDENTIFICATION

CAS RN

6226-79-5

EINECS RN

228-319-2

FORMULA

C22H12N4Na4O13S4

MOLE WEIGHT

760.57

H.S CODE

3204.19.4000

SMILES

c12c(cc(S(=O)(=O)[O-])c(c1\N=N\c1c(ccc(c1)\N=N\c1ccc(S(=O)(=O)[ O-]) cc1)S(=O) (=O)[O-])O)cc(S(=O)(=O)[O-])cc2.[Na+].[Na+].[Na+].[Na+]

CLASSIFICATION

Stain, Azo dye, Protein stub, Coloring Agent

EXTRA NOTES

Ponceau S, Acid Red 112, or C.I. 27195 is a sodium salt of a diazo dye that may be used to prepare a stain for rapid reversible detection of protein bands on nitrocellulose or PVDF membranes (Western blotting), as well as on cellulose acetate membranes.

 

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE.

dark brown to dark red powder

MELTING POINT

2

BOILING POINT

 

DENSITY

 

SOLUBILITY IN WATER

10 g/l

SOLVENT SOLUBILITY

Insoluble in ether

VAPOR DENSITY

 

log P(octanol-water)

1

VAPOR PRESSURE

 

AUTOIGNITION TEMP

 
pK

 

REFRACTIVE INDEX

 

FLASH POINT

 

 

STABILITY AND REACTIVITY
STABILITY Stable under normal conditions.

INCOMPATIBLE MATERIALS

Strong oxidizing agents

POLYMERIZATION

Has not been reported

NFPA RATINGS

Health: 0, Flammability: 0, Reactivity: 0

 

EXTERNAL LINKS & GENERAL DESCRIPTION

USA.gov - Ponceau S

Wikipedia Linking - Ponceau S

Google Scholar Search - Ponceau S

Drug Information Portal (U.S. National Library of Medicine) - Ponceau S

PubChem Compound Summary - Ponceau S

KEGG (Kyoto Encyclopedia of Genes and Genomes) - Ponceau S

http://www.ncbi.nlm.nih.gov/ - Ponceau S

EPA - Substance Registry Services - Ponceau S

 

SALES SPECIFICATION

APPEARANCE

dark brown to dark red powder

CONTENT

85% min

LOSS ON DRYING

10% max

 

TRANSPORT & REGULATORY INFORMATION

UN NO.

 

HAZARD CLASS

 

PACKING GROUP  

 

SAFETY INFORMATION

HAZARD OVERVIEW

May cause respiratory irritation. Causes skin irritation. Causes serious eye irritation

SIGNAL WORD Warning

PICTOGRAMS

HAZARD STATEMENTS

H315-H319-H335

P STATEMENTS

P261-P305 + P351 + P338

EC DIRECTIVES

 

HAZARD CODES

RISK PHRASES

36/37/38

SAFETY PHRASES

26-37/39

 

PACKING

Preserve in light-resistant and well-closed containers