... It is used in the building industry, in the production of feedstuff mixtures, for silage and in the tannery. CompositionTec gradePurity ... from sodium formate. Sodium formate is used In the manufacture of sodium hydrosulfite, a common reductive bleaching chemical. 2. Reductive bleaching ... dyeing, in electroplating, in silage preservation Preservatives Calcium Formate 98% (H,S Code 29151200) (HCOO)2Ca