Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 845-10-3, Whether you call it Methyl Red Sodium Salt, 2-[4-(Dimethylamino)phenylazo]benzoic Acid Sodium Salt or Acid Red 2 - Water Soluble you can be assured the Methyl Red Sodium Salt products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.