Potassium trifluoromethanesulfonate2926-27-436 % similar Potassium monomethylsulfate562-54-936 % similar Potassium metabisulfite16731-55-835 % similar Dipotassium piperazine-1,4-bis(2-ethanesulfonate)108321-27-332 % similar Ferroin14634-91-430 % similar