Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 3068-88-0, Whether you call it beta-Butyrolactone, 4-Methyl-2-oxetanone , &#223 or -Methylpropiolactone you can be assured the beta-Butyrolactone products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.