Ponceau S Chemical Properties

Density 

1.01 g/mL at 20 °C

refractive index 

n20/D 1.338

storage temp. 

Store at RT.

solubility 

H2O: soluble1mg/mL

form 

Powder/Solid

Colour Index 

27195

color 

Red-brown

PH

9.0 (10g/l, H2O, 20℃)

Water Solubility 

10 g/L

Stability:

Stable. Incompatible with strong oxidizing agents.

CAS DataBase Reference

6226-79-5(CAS DataBase Reference)

EPA Substance Registry System

2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-[[2-sulfo-4-[(4-sulfophenyl)azo]phenyl]azo]-, tetrasodium salt (6226-79-5)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36-37/39

WGK Germany 

3

RTECS 

QJ6600000

TSCA 

Yes

HS Code 

32041200

MSDS

• Language:English Provider:Ponceau S
• Language:English Provider:SigmaAldrich
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Ponceau S Usage And Synthesis

Chemical Properties

red powder

Definition

ChEBI: An organic sodium salt that is the tetrasodium salt of 3-hydroxy-4-({2-sulfo-4-[(4-sulfophenyl)diazenyl]phenyl}diazenyl)naphthalene-2,7-disulfonic acid.

Ponceau S(6226-79-5)Related Product Information

• PHENOLSULFONIC ACID
• 2,5-Diaminobenzenesulfonic acid
• 1-Amino-2-naphthol
• METANILIC ACID SODIUM SALT
• ammonium naphthalenesulphonate
• AZOBENZENE
• sodium hydrogen 4-aminoazobenzene-3,4'-disulphonate
• 1-Aminonaphthalene-6-sulfonic acid
• 4-Aminothiophenol
• 2-Chloro-5-hydroxypyridine
• PONCEAU 4 GB
• Ponceau S
• Sulfamic acid
• SX Ponceau SX
• 1-DODECANESULFONIC ACID SODIUM SALT
• 4-PHENYLAZOPHENOL
• CHLOROPHOSPHONAZO III
• Taurine