Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 15220-11-8, Whether you call it 4-Methylumbelliferyl Sulfate Potassium Salt or 2H-1-Benzopyran-2-one - 4-Methyl-7-(sulfooxy) you can be assured the products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.