Yellow prussiate of soda.

Yellow prussiate of soda (sodium ferrocyanide decahydrate: Na 4 Fe(Cn) 6 °-10H 2 O) may be safely used as an anticaking agent in salt for animal consumption at a level not to exceed 13 parts per million. The additive contains a minimum of 99.0 percent by weight of sodium ferrocyanide decahydrate. [41 FR 38657, Sept. 10, 1976; 41 FR 48100, Nov. 2, 1976]