... slowly when exposd to moist air. 3.Usage: Used as food fermentation,detergent ingredient,carbondoxide foamer,pharmacy,leather," ore milling and ... wool,exting uisher and metal heat-treating,fiber and rubber industry, etc, 4.specificationChemical Properties :-Total Alkalinity as NaHCO3 ( Min ) :- 99 ... :– Traces Copper as Cu PPM max :- Traces Sell sodium bicarbonate food and industry grade