Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 599-04-2, Whether you call it D-(-)-Pantoyl Lactone, Pantolactone , Pantoic Acid &#947 or -Lactone you can be assured the D-(-)-Pantoyl Lactone products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.