I-Potassium ferricyanide, K3Fe(CN)6, i-red prussiate of potash: amakristalu abomvu aphuzi angenamanzi, isixazululo sawo siphuzi kakhulu. Yenziwa ngokudlulisa i-chlorine esixazululweni se-potassium ferrocyanide (Gmelin 1822; Thorpe 1912). Kanye nensimbi ne-ammonium citrate, iyisenzi-sibozi se-cyanotype.