p-Hydroxyanisole

What Is It?

p-Hydroxyanisole is a white, waxy solid. It has been reported uses in profession use artificial nail systems.

Why Is It Used?

p-Hydroxyanisole functions as an antioxidant.

Scientific Facts

p-Hydroxyanisole is a substituted phenol.

Safety Information

The safety of p-Hydroxyanisole has been assessed by the Cosmetic Ingredient Review (CIR) Expert Panel. The CIR Expert Panel reviewed the scientific data and concluded that p-Hydroxyanisole was unsafe for use as a cosmetic ingredient. In 2003, as part of the scheduled re-evaluation of ingredients, the CIR Expert Panel considered available new data on p-Hydroxyanisole and reaffirmed the above conclusion.

CIR Safety Review: Undiluted p-Hydroxyanisole was a severe skin and ocular irritant and a skin sensitizer. p-Hydroxyanisole was nonmutagenic in bacteria. Solutions of p-Hydroxyanisole produced embryotoxicity, but not teratogenicity.

The function of p-Hydroxyanisole in cosmetics is that of an antioxidant it is not intended for use as a skin lightener or skin-depigmenting agent. Because of the depigmenting action of p-Hydroxyanisole observed in laboratory studies at reported concentrations approaching those used in cosmetics, the CIR Expert Panel concluded that p-Hydroxyanisole was unsafe for use as a cosmetic ingredient. In the European Union, p-Hydroxyanisole may be used in professional use artificial nail systems at a maximum concentration of 0.02% after mixing (see Annex III).

Link to the EU Cosmetic Regulation:
http://europa.eu/legislation_summaries/consumers/product_labelling_and_p…

In Canada, p-Hydroxyanisole is also permitted for use artificial nail systems at a maximum concentration of 0.02% after mixing.

Link to the Health Canada website: 
http://www.hc-sc.gc.ca/cps-spc/person/cosmet/info-ind-prof/_hot-list-cri…

More Scientific Information

Other technical names for p-Hydroxyanisole include hydroquinone monomethyl ether, 1-hydroxy-4-methoxybenzene, mequinol, 4-Methoxyphenol, p-methoxyphenol and monobenzone.