... produce nitric acid. Soil nitrate with potassium, sodium, magnesium and other ions to form nitrate. Sodium nitrate in the soil that comes out ... cattle pens house, courtyard of the old skirting, cliff, cave, and not easy to be rained on the ground. Nitrate soil ... agent, enamel material, salt bath, chromogenic reagent and antiseptic.Defence : Wearing mask and gloves, no inhale the powder, protect skin 3 ...