Can you please suggest some water soluble organic calcium salts that can be autoclaved?
Calcium acetate, (CH3COO)2Ca, is water-soluble organic salt.
Calcium citrate solubility is only 0.095 g / 100 g of water at 25 oC. I would go for calcium acetate as well (34 g / 100 g of water at 20 oC).
Calcuim acetate is soluble in water definitely (one of the solubility rules: all acetates are soluble) but this salt is one of the few salts that become less soluble as temperature increases (this leads to some precipitation at the bottom). When preparing aqueous solution of it , you will observe turbidity but leave it for some time in a cold room & you will see a clear solution. This is what I saw in the behavior of lead acetate & I guess the calcium salt will have a similar one.
CAlcium is a Perioid III metal in Group 2 and organic acids are weak. Any rise in pH will cause Ca(OH)2 or CaCO3 to precipitate. You can eliminate this (providing the acid is stable at 120oC) by adding enough of the appropriate acid to give a pH
There are numerous water soluble organic calcium salts such as calcium acetate, calciumcitrate, calcium gluconate calcium lactate etc.The first two organic calcium salts are fairly soluble in water at room temp but after autoclave dissociation may take place and precipitation of calcium carbonate will start. I expect calcium citrate should be better than alcium acetate.
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