... of indexFCC-1996Content(on the base of dry basis),%≥99.0Arsenic (As),%≤0.0003Heavy metal(As Pb),%≤0. ... or Br experiment:NormalSodium experiment :Normal6.USES: In food industry, it is used as salt substitutes, nutrition ... enhancers, gelling, yeast food,flavor regulator,PH value.And also to use as ... poisonous. Its expiry date is one year. food grade sodium citrate