Potassium Chloride

Potassium Chloride KCl = 74.55 (7447-40-7)

Analytical reagent grade of commerce.

Potassium chloride used for infrared absorption spectrophotometry complies with the following test.

The infrared absorption spectrum, Appendix II A, of a disc 2 mm thick prepared from material previously dried at 250° for 1 hour has a substantially flat baseline over the range 4000 to 620 cm^–1; it exhibits no maxima with an absorbance greater than 0.02 above the baseline with the exception of maxima due to water at 3440 and 1630 cm^–1.