Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 3368-04-5, Whether you call it 4-Methylumbelliferyl Phosphate or 2H-1-Benzopyran-2-one - 4-Methyl-7-(phosphonooxy) you can be assured the products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.