Photoresist Chemicals Phosphonium,1,1′-[(1E)-1,2-bis(dimethylamino)-1,2-ethenediyl]bis[1,1,1-tributyl-,1,1,1-trifluoromethanesulfonate (1:2) Cas:922524-15-0 Molecular Formula:C30H66N2P2.2CF3O3S