Magnesium Sulfate Heptahydrate 99% AR Grade Reagent
White needle crystal or powder. It tastes bitter and cool. Weathered. At room temperature, one molecule of crystal water is lost in dry air, 4 molecules of crystal water are lost at 70-80 ° C, 5 molecules of crystal water are lost at 100 ° C, 6 molecules of crystal water are lost at 120 ° C, and can be quickly reabsorbed in humid air. Moisture, loses all crystal water at about 250 °C. Solubility in water (g/100 ml): 71 at 20 ° C and 91 at 40 ° C.
Used to precipitate lead in the analysis. Mordant.
Item of Analysis
Transparency of solution
to pass test
Insoluble in water,%
Heavy metals(as Pb),%
Not a hazardous substance or mixture.