7630. Potassium Ferricyanide

Nomenclature

CAS number: 13746-66-2
Potassium (OC-6-11)-hexakis(cyano-κC)ferrate(3-) (3:1); potassium hexacyanoferrate(III); red prussiate of potash.
C6FeK3N6; mol wt 329.24.
C 21.89%, Fe 16.96%, K 35.63%, N 25.53%.
K3Fe(CN)6.

Properties

Ruby-red crystals. d 1.89. Slowly sol in 2.5 parts cold water, in 1.3 parts boiling water; slightly sol in alc; dec by acids. The aq soln dec slowly on standing. Protect from light.

Use

Chiefly for blueprints; in photography; also for staining wood, dyeing wool, calico printing, as etching liquid (Mercer's liquor), tempering iron and steel; in electroplating; as a mild oxidizing agent in organic synthesis; in analytical chemistry.