An antimicrobial or preservative is defined as a chemical substance that will kill microorganisms or inhibit the growth of microorganisms, usually added to nonsterile products to protect them from microbiological contamination. If your product will be on the market, it is advised that it has been validated to be free from microbiological contaminants through Antimicrobial Preservative Effectiveness (APE) Testing. https://www.ste-mart.com/a...