Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 70131-67-8, Whether you call it Polydimethylsiloxane, Silanol Terminated, Emulsion, &#945, -Hydroxy-&#969 or -hydroxypoly-(dimethylsiloxane) you can be assured the Polydimethylsiloxane, Silanol Terminated, Emulsion products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.