LIQUID SODIUM HYPOPHOSPHITE PALM's LIQUID SODIUM HYPOPHOSPHITE is blended exclusively from Rhône-Poulenc's High Purity Grade of Sodium Hypophosphite for use in electroless nickel solutions. It is the purest material available commercially and is made to demanding specifications from high purity water, and is subjected to careful quality control testing.. Formula NaH2PO2 H2O Concentration 5 pounds per gallon or 600 g/L Appearance Clear oderless liquid Typical Analyses By weight Sodium hypophosphite 47 percent Phosphite 0.14 percent Calcium 12 ppm Heavy metals <1 ppm Iron <1 ppm pH 5.0 to 6.5 Specific Gravity 1.27 Packaging 55 gallon drums, 581 pound net weight Shelf Life Indefinite Storage/Safety Store in a cool, dry, ventilated area away from oxidizing agents. Keep container tightly closed