Dissolve it in H2O, filter and precipitate it by adding MeOH. Filter off the solid and dry it in a vacuum at 85o. Alternatively, dissolve it in H2O, filter (from insoluble inorganic Ca) and evaporate it to dryness under vacuum at 85o. [March et al. J Am Pharm Assoc 41 366 1952, Beilstein 3 IV 1255.]
white crystalline powder or granules
In sewage purification; in coffee powders to prevent caking.
Calcium Gluconate is used as an inert ingredient in pesticide formulations applied to crops. It is also used as a supplement to fortify beverages and foods lacking a sufficient amount of calcium.
Calcium gluconate is the calcium salt of gluconate, being an oxidative product of glucose containing 9.3% calcium. Calcium gluconate is a kind of mineral supplement and medication. It can be used for vein injection to treat the low blood calcium, high blood potassium, and magnesium toxicity. It is required only when there is not enough calcium in the diet. It is also used for the treatment of black widow spider bites to relieve muscle cramping and treatment of osteoporosis or rickets. It can also be used to decrease the capillary permeability in allergic conditions, nonthrombocytopenic purpura and exudative dermatoses.