Cosmocil CQ
CAS No. 27083-27-8
Cosmocil CQ is a broad spectrum, fast acting bactericide. A 20% aqueous solution of poly(hexamethylenebiguanide) hydrochloride, also known as PHMB, Cosmocil CQ is an effective preservative for make-up removers, moisturizing toners, facial cleansers, wet wipes and also offers antibacterial and deodorant properties. Originally formulated for the contact lens industry, it is also typically used in baby wipes. It is gentle in-use, with low eye and skin irritancy and low oral toxicity.
Cosmocil CQ is an effective non-formaldehyde, non-paraben preservative with no VOCs (Volatile Organic Compounds) which is heat and UV stable. It is effective over a broad pH range (4-10), but most effective at a pH of 6.0 or less. As it is cationic, it is compatible with cationic, amphoteric and non-ionic surfactants. It is incompatible with strongly anionic systems.
Cosmocil CQ is incompatible with natural liquid soaps and beeswax/borax emulsions. It is more compatible with cationic emulsifiers like Lotioncrafter BTMS.
Cosmocil CQ is heat stable to at least 80°C (176°F) and can be added pre or post emulsification. For complex formulations, consider combining with another preservative for a broader spectrum of activity or potassium sorbate for increased antifungal/mold protection.**
Recommended usage level: 0.2 - 1.5%.
Appearance: Clear to slightly pale yellow, slightly opalescent liquid.
pH: 5.0 - 5.5
Specific Gravity: 1.04
Solubility: Soluble in water. Miscible with ethanol, glycerin, and propylene glycol.
INCI: Polyaminopropyl Biguanide
Click here to access "Cosmocil CQ Antimicrobial - Effective Use in Personal Hygiene Wipes" by Dr. Terry Yeates, Avecia Protection & Hygiene, developers of Cosmocil CQ. Of particular interest is Table 1 citing how Cosmocil CQ may be co-formulated with additional antimicrobial agents to provide complementary and wider spectrum of activity (including the use of potassium sorbate, among others).
Click here to access MSDS.
