chemical database CAS Number directory 2 252238-71-4 CAS 252238-71-4 chemical formula,CAS 252238-71-4 MSDS,CAS 2522 ... 252238-71-4 MSDS,CAS 252238-71-4 chemical properties CAS Number 252238-71-4 chem name 1,1'2'1'-Terphenyl,4,4'-diethynyl-3'4'5'6'-tetrakis(4-eth