Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 1229-29-4, Whether you call it Doxepin Hydrochloride or (E)-3-(Dibenz[b -e]oxepin-11-ylidene)propyldimethylamine Hydrochloride you can be assured the products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.