CAS 70131-67-8 appears in our catalog under these names: Polydimethylsiloxane, hydroxy terminated, M.W. 4200 , Silanol terminated polydimethylsiloxane cSt 90-120, 98%, Polysiloxanes, di-Me, hydroxy-terminated, 45-50 cst,Hydroxyl Value≤3.0%, Polysiloxanes, di-Me, hydroxy-terminated, 25~45 cst, Polysiloxanes, di-Me, hydroxy-terminated, 98%. Offered by: Thermo Scientific (Alfa Aesar), Fluorochem, BLDpharm, Chemat, Sigma-Aldrich. Available pack sizes: 50ml, 250ml, 1L, 2.5L, 1kg, 100g, 500g, 25g.