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An assortment of different preservative formulations has been used in ophthalmic medicines and many of these preservatives have been linked to unwanted ocular surface side effects. Benzalkonium ...

Polyquad ® is a detergent-type preservative derived from BAK. Polyquad was formulated in the mid 1980s by Alcon as a preservative for contact lens storage solutions. It was developed because ...

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This circumstance led to experiments to ascertain the preservative nature of coal tar. More than fifty years ago W. H. Hyett and others impregnated wood with gas tar, and reported that cuch wood ...