Explanatory notes
… (3) Tetrapotassium hexacyanoferrate (K 4 Fe(CN) 6 .3H 2 O). Yellow crystals, efflorescent, soluble in water, … dilithium dipotassium hexacyanoferrate Li 2 K 2 (Fe(CN) 6 ).3H 2 O). The heading excludes Prussian blue (Berlin blue) …