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Hexamethylenetetramine is extensively used as a food preservative, primarily in fish products, where it has been found a particularly effective inhibitor of the growth of micro-organisms. Nikkilä (5), for example, established that hexamethylenetetramine at a concentration as low as 0.01 per cent completely arrests at both pH 5 and 7 the growth of bacteria ( Micrococcus, Sareina, Achromobacter, Flavobacterium and Corynebacterium) that are responsible for the spoilage of fish preserves. In earlier studies it has been reported that molds are much less susceptible to the action of hexamethylenetetramine than bacteria and yeasts, v. Schel-

Chemical preservatives in foodstuffs. III Hexamethylenetetramine as mold inhibitor and the antagonistic action of amino acids