Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 7320-34-5, Whether you call it Potassium Pyrophosphate, Diphosphoric Acid Tetrapotassium Salt or Tetrapotassium Pyrophosphate you can be assured the Potassium Pyrophosphate products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.