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What Is An Antimicrobial Preservative?
Antimicrobial preservatives are substances added to non-sterile dosage forms to protect them from microbiological growth of microorganisms accidentally introduced during or after the manufacturing process (production). Substances used as preservatives kill microorganisms or stop their reproduction. Preservatives in products must be in sufficient concentration to provide protection throughout the shelf life and usage period of the product. The substance to be used as a preservative is against all kinds of microorganisms that may enter the product;
• Being effective at low concentrations,
• It has no allergic, toxic or irritating effect on the consumer,
• Being stable during production and throughout the shelf life of the product (at changing temperature and pH values),
• It is compatible with other substances in the formulation,
• Being colorless and odorless, soluble in water, and not changing the physical properties of the product,
• It kills microorganisms immediately so that they do not adapt to the environment, it complies with laws and regulations, and it is cheap and easily accessible,

It must have some features such as: This evaluation is made through a screening-challenge (antimicrobial activity) test. It is mandatory to apply it to cosmetics, as it provides an assurance that the preservatives included in the formula can protect the product against the risk of deterioration or infection from production until it is completely consumed under normal storage and use conditions.