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CAS RN: 3761-53-3 | Product Number: P0590

Acid Red 26

  • Ponceau de Xylidine
  • Ponceau R
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Product Number P0590
Molecular Formula / Molecular Weight C__1__8H__1__4N__2Na__2O__7S__2 = 480.42  
Physical State (20 deg.C) Solid
CAS RN 3761-53-3
Reaxys Registry Number 8180148
PubChem Substance ID 87574757
Colour Index 16150
MDL Number


Appearance Red to Dark red to Brown powder to crystal
Lambda max. 504.0 to 508.0 nm(H2O)
Absorbance(E1%1cm) min. 490(H2O, 504.0 to 508.0 nm)(calcd.on dried substance)
Drying loss max. 12.0 %
Properties (reference)
Maximum Absorption Wavelength 506(H2O) nm
Solubility in water Soluble
Solubility (very slightly) Acetone,Ethanol
Solubility (insoluble in) Ether,Benzene
Pictogram Pictogram
Signal Word Warning
Hazard Statements H341 : Suspected of causing genetic defects.
H351 : Suspected of causing cancer.
Precautionary Statements P501 : Dispose of contents/ container to an approved waste disposal plant.
P202 : Do not handle until all safety precautions have been read and understood.
P201 : Obtain special instructions before use.
P280 : Wear protective gloves/ protective clothing/ eye protection/ face protection.
P308 + P313 : IF exposed or concerned: Get medical advice/ attention.
P405 : Store locked up.
Related Laws:
EC Number 223-178-3
RTECS# QJ6825000
Transport Information:
HS Number 3204120090
PubMed Literature

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