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EC number: 234-522-7
CAS number: 12007-92-0
In aqueous solutions at physiological and acidic pH, low
concentrations of simple inorganic borates such as boric acid, disodium
tetraborate decahydrate, disodium tetraborate pentahydrate, boric oxide
and disodium octaborate tetrahydrate will predominantly exist as
undissociated boric acid. At about pH 10 the metaborate anion (B(OH)4-)
becomes the main species in solution (WHO, 1998). This leads to the
conclusion that the main species in the plasma of mammals and in the
environment is un-dissociated boric acid. Since other borates dissociate
to form boric acid in aqueous solutions, they too can be considered to
exist as un-dissociated boric acid under the same conditions.
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