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solubility disodium EDTA in water at pH 5
Is EDTA disodium at 0.1% is totally soluble in water at pH 5?
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6 Replies
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Why don’t you just try it and see? How will you learn if you don’t experiment?
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great answer and how true
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i ask because i have tried it
, and i notice some
small crystals. Since i see that many formulation have edta at 0.1%, i’m asking
to know if it’s normal to have the final formulation with some unsolubilized
edta. -
Water at pH 5 is not water but an acid. EDTANa2 is a salt. Adding this to an acid will form EDTA free acid or the monosodium EDTA salt. Both of these have a limited solubility in water - the free acid being effectively insoluble.
A formulated product would normally be a complicated mixture of numerous components and crystal formation may well not occur in the presence of these, whatever the pH.
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So if i understand your point, better add the EDTA at the end, when the system can avoid formation of crystals
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Possibly. I think it depends on the other components in the system.
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