Molecular formula Ca(NO2)2 Molecular weight 132 Appearance White or faint yellow epipastic Packaging Packed in woven bags with plastic liner,NW:25kg or 40kg Specification (no crystal water) Ca(NO2)2 W% (dry basis) ≥ 94 92 90 Ca(NO3)2 W% (dry basis) ≤ 4.5 5.0 6.0 Insoluble substance in water W% (dry basis)≤ 1.0 1.5 2.0 H2O W% ≤ 1.0 1.5 2.0 [USE] Used as main material of concrete antifreezer . Over the disadvantages of alkali aggregate reaction and electric chemical corrosion ,improve physical properties and durability. [Precautions] Poisonous(GB5.1) Can not be mixed with organic, inflammable articles, kept in moistureproof , heat-proof place