Don't Let Bacteria and Fungi Spoil YOUR Product! Many pharmaceuticals, cosmetics and indus trial products require a preservative to prevent the growth of microorganisms which may cause discoloration,objectionable odor or deterioration. The Heyden Parasepts (esters of parahydroxybenzoic acid) have long given valuable service as inhibitors of bacterial and fungal growth in a wide variety of products. They combine the properties of high effectiveness, stability, and extremely low toxicity, in addition to being col orless, odorless and practically tasteless. Five Parasepts are available to meet your par ticular requirements. Research has shown the advantages of using a combination of two or three esters, which gives better protection against microbial contamination than any one ester.
HEYDE N
PARASEPTS
Write for a copy of the technical bulletin on the Parasepts. Samples (Purified or Technical) are available promptly on request. METHYL PARASEPT (Methylparaben U.S.P.)
HEYDEN CHEMICAL CORPORATION 342 Madison Avenue, New York 17, Ν. Υ. CHICAGO
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PHILADELPHIA • SAN FRANCISCO •
DETROIT .
PROVIDENCE
ETHYL PARASEPT PROPYL PARASEPT (Propylparaben U.S.P.)
BUTYL PARASEPT BENZYL PARASEPT Shipped in 100, 50 and25-lb.
fiber drums.
