The preservatives PHMB used for skin care and makeup

When it comes to skin care and makeup, many of us probably have a list of ingredients we would never put on our faces. Today we will introduce what is polyaminopropyl biguanide, also known as polyhexamethylene biguanide or PHMB. The ingredient is used in some pretty popular products in the USA.

PHMB is a synthetic polymer that is used as a broad-spectrum preservative and antimicrobial agent in skin care. It is a new kind of multi-purpose bactericidal and bacteriostatic polymer. It will produce ionization in aqueous solution. Its hydrophilic part contains strong positive electricity. It can absorb all kinds of bacteria and viruses which are usually negative electricity, enter into the cell membrane, inhibit the synthesis of liposomes in the membrane, cause the cell to die, and achieve the best bactericidal effect.

PHMB with the chemical name of Poly(hexamethylenebiguanide) hydrochloride. The main purity is 98% powder and 20% liquid. PHMB has proven antibacterial properties, The safe dosage of PHMB used as a preservative in a concentration should be lower than 0.3-percent in cosmetic products. It can be found in many personal-care products, including skin care, cosmetics, eye-care solutions, wound care, and surgery care.

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