Abstract
Summary
P-aminobenzoic acid is rapidly absorbed from the gastrointestinal tract in dog and man while p-aminohippuric acid is poorly absorbed.
One commercial lot (National Aniline No. 12322) of p-aminohippuric acid was found to be contaminated with 23% of p-aminobenzoic acid.
None of the contaminated material, to our knowledge, has been marketed in ampouled form for clinical investigation and an adequate control is now being maintained on the purity of clinical material.
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