@freemo oh wow. Wild that it's not sold as the phosphate salt. H3PO4 will def etch your tooth enamel if it sits there for long.
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Getzler Lab at KenyonCollege (getzlerchem@mstdn.science)'s status on Monday, 05-Feb-2024 11:09:33 JST Getzler Lab at KenyonCollege -
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Getzler Lab at KenyonCollege (getzlerchem@mstdn.science)'s status on Monday, 05-Feb-2024 11:01:57 JST Getzler Lab at KenyonCollege @freemo fun experiment! It is not considered a strong acid in that it does not fully dissociate in water, but it still, IMO, deserves a little cautious respect. Fully protonated phosphoric acid (H3PO4) is ~150x stronger than acetic acid (vinegar). In your mixture, it may have been present to pronate the vitamin to make it positively charged and therefore more soluble. The second deprotonation (of H2PO4-) is ~300 times weaker than acetic acid.