Calcium Nitrate Purity: 99% Ca(NO2)2 Industrial grade & Agri grade. Good price,quality & service. Calcium NitrateMolecular formula: Ca(NO2)2 CAS NUMBER: 13780 ... the main material of concrete additive, it can be used in the making of antifreeze, rust inhibitor of steel bar, early ... strength agent, it also can be used in the washing of heavy oil, emulsification of lube and chemicals ...