Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 853-68-9, Whether you call it 9,10-Anthraquinone-2,6-disulfonic Acid Disodium Salt or Disodium Anthraquinone-2 -6-disulfonate you can be assured the products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.