4,4’-difluorodiphenyl Sulfone Cas No. 383-29-9 - QingdaoScienocChemical ( China ) - Offers to Sell and Export - Saturday 21 March 2015 8:12 am - 4 4’ difluorodiphenyl sulfone cas no 383 29 9 formula c12h8f2o2s molecular weight 267 0425 application for reference raw material for sulfone polymer film pemfc plastic additive organi...