Preservatives are substances added to products - such as cosmetics, detergents, paper products, tapping fluids and paints - to reduce the growth of microorganisms.
Preservatives are biologically active substances and can also cause allergies.
The compounds that preserve most efficiently, are usually also the most allergenic. Whereas less allergenic drugs, on a whole, are not sufficiently effective to preserve well. They are therefore often used in combination with other preservatives.
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