Cosmocil CQ is a really novel preservative, relying upon polyhexamethylene biguanide (PHMB) as the preservative, which is neither a formaldehyde releaser nor a paraben based product. The INCI is polyaminopropyl biguanide. It’s both a bacteriostatic and bactericidal preservative that should be combined with a fungicide like one of the parabens, potassium sorbate, or sodium benzoate (one…
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