1,1,1-Trifluoroethane420-46-2100 % similar 2,2-Difluoropropane420-45-138 % similar 2,2-Difluoro-1-propanol33420-52-933 % similar 1,1-Dichloro-1-fluoroethane1717-00-631 % similar 1-Chloro-1,1-difluoroethane75-68-331 % similar