Sodium hexafluorophosphate21324-39-033 % similar Lithium hexafluorophosphate21324-40-333 % similar Silver hexafluorophosphate26042-63-733 % similar (1-Butyl)triethylammonium bromide13028-69-831 % similar 1-Butylpyridinium hexafluorophosphate186088-50-630 % similar