Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 93-14-1, Whether you call it Guaifenesin, Glyceryl Guaiacolate , Guaiacol Glyceryl Ether or 3-(o-Methoxyphenoxy)-1 -2-propanediol you can be assured the Guaifenesin products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.