KCl
M.W.: 74.55 g/mol
Physical State : Solid
Appearance : White crystalline powder
Odor : Odorless
Assay : >99.0%
Taste : Saline (Strong)
pH : 5.0 – 8.0  (1 M in H2O at 25 °C)   
Density : 1.98 g/mL at 25 °C (77 °F) (Water = 1)
Solubility : 1 M in H2O at 20 °C, clear, colorless
Soluble in cold water, hot water.
Very slightly soluble in methanol, n-octanol.

For the preparation of phosphate buffered saline(PBS), and for the extraction and solubilization of proteins.