#64202
Yellow Prussiate of Potash

lemon yellow crystals - Potassium hexacyanoferrate(II) trihydrate is known as yellow blood liquor salt. They are highly soluble in water and in acetone. The water solubility increases greatly when heated. When heated above 60 °C, the salt gives off its water of crystallization and turns into a white powder. When heated more strongly, the powder decomposes and the highly toxic potassium cyanide can be formed. In the past, blood liquor salts were prepared by annealing dried blood, horn shavings and nitrogenous animal substances with iron filings and potash. Depending on the air supply and temperature, yellow or red blood leach salt is produced. In the laboratory, potassium ferricyanide(II) is used to detect ferric salts. To prepare a 0.5-molar potassium ferricyanide(II) solution, dissolve 21.1 grams of potassium ferricyanide(II) trihydrate in 70 milliliters of water and then make up to 100 milliliters with water. This produces the pigment Berlinerblau, which is also known as "Prussian blue" or Parisian blue. In addition, the yellow blood liquor salt is used to remove heavy metal impurities in water and for printing and dyeing in the textile industry.