Potassium Chloride (KCl)-Powder

Characteristic

Potassium chloride (also known as KCl or potassium salt) is a metal halide salt composed of potassium and chlorine. It is odorless and has a white or colorless vitreous crystal appearance. 

Chemical formula：KCl

Molar mass：74.5513 g·mol⁻¹

Appearance：white crystalline solid

Odor：odorless

Density：1.984 g/cm³

Melting point：770 °C (1,420 °F; 1,040 K)

Boiling point：1,420 °C (2,590 °F; 1,690 K)

Solubility in water：217.1 g/L (0 °C)

                                 253.9 g/L (20 °C)

                                 360.5 g/L (100 °C)

Solubility：Soluble in glycerol, alkalies

Slightly soluble in alcohol Insoluble in ether

Solubility in ethanol 0.00288 g/L (25 °C)

Acidity (pKa)：~7

Magnetic susceptibility (χ)：−39.0·10⁻⁶ cm³/mol

Refractive index (nD)：1.4902 (589 nm)

Crystal structure：face centered cubic

Application

KCl is used as a fertilizer, in medicine, in scientific applications, and in food processing, where it may be known as E number additive E508.