Potassium perfluorohexanesulfonate3871-99-633 % similar 1-Hexyl-3-methylimidazolium trifluoromethanesulfonate460345-16-833 % similar Nickel sulfate hexahydrate10101-97-032 % similar Nickel sulfate heptahydrate10101-98-132 % similar Nickel sulfamate13770-89-332 % similar Triflic acid1493-13-632 % similar Nickel sulfate hydrate15244-37-832 % similar Ammonium nickel sulfate ((NH4)2Ni(SO4)2)15699-18-032 % similar Trifluoromethanesulfonic anhydride358-23-632 % similar Bistriflimide82113-65-332 % similar 2,4-Diphenyl-5,6,7,8-tetrahydro-1-benzopyran-1-ium trifluoromethanesulfonate81128-01-032 % similar