Trimethylamine sulfur trioxide3162-58-140 % similar Tetramethyl-P-phenylenediamine dihydrochloride637-01-433 % similar Hydrogen chloride7647-01-033 % similar Triethylamine monohydrochloride554-68-731 % similar 2-(Dimethylamino)ethanethiol hydrochloride13242-44-930 % similar Dimethylaminoethyl chloride hydrochloride4584-46-730 % similar