UV Filter

Novel Azobenzene Compound to Extend and Reactivate UV Protection

May 1, 2014Jin-Ye Wang, PhD, and Shengyong Geng, Shanghai Jiao Tong University, Shanghai, China

Two azobenzene compounds were synthesized and combined in liposomal membranes. Their physico-chemical properties and biocompatibility were evaluated. The safer one was chosen, and its protective function for UVA and UVB were tested in vitro and in vivo. This azobenzene liposomal formulation provided good efficacy with longer shelf life, which could be utilized as a novel kind of repeated UV absorber.

Ashland Adds Homosalate UVB Filter to Offering

Oct 1, 2013

Ashland Specialty Ingredients, a commercial unit of Ashland Inc., has added a homosalate UVB filter to its Escalol range of UV filters.

CSIRO and Larissa Bright Mimic Coral Protection for Broad-spectrum UV Filters

Aug 14, 2013

CSIRO, in partnership with skin care company Larissa Bright Australia, has created UVA/UVB sunscreen filters that mimic the natural sun protection used by corals on the Great Barrier Reef.

Ingredient Profile—Ethylhexyl Methoxycinnamate

Feb 1, 2012Michael J. Fevola, PhD, Johnson & Johnson

Ethylhexyl methoxycinnamate (EHMC) is among the most frequently used organic ultraviolet (UV) filters, known primarily for its role as an active ingredient in sunscreen products.

Ingredient Profile: Titanium Dioxide

Jun 1, 2011Mike J. Fevola, Johnson & Johnson

While TiO2 is often incorporated as a colorant and an opacifier in cosmetics and personal care products, its most important applications are as a sunscreen active and as a component of specialty pigments for color cosmetics.

A Melanin Derivative to Shield the Skin from High Energy Visible Light

Mar 1, 2011N. Dayan, PhD, Lipo Chemicals Inc.; A. Ballantyne, T. Ngo, J. Davis, A. Peterson, K. Larsen, J. Gray and H. Knaggs, PhD, Nu Skin Enterprises Inc.; and J. Gallas, PhD, Photo Protective Technologies Inc.

High energy visible (HEV) light recently has been suspected of causing as much damage as UVA and UVB combined. Thus, the present paper describes a fractionated melanin tailored to absorb light in the visibile 400–500 nm range. In addition, because the material exhibits color, the authors focus on formulation techniques to incorporate it into semi-solid formulations.

Meeting the UVA Challenge: Inorganic-only Sun Protection

Sep 1, 2010Paul Staniland, PhD, and Julian P. Hewitt; Croda Sun Care and Biopolymers

The production of a range of titanium dioxide-based dispersions is explored to provide enhanced UVA protection, in comparison with ultrafine titanium dioxide. Formulations containing these dispersions as the only active are shown to achieve a UVA protection factor that is 1/3 of the labeled SPF value, thus meeting European Commission recommendations.

Silicon Microspheres as UV, Visible and Infrared Filters for Cosmetics

Sep 1, 2010Isabelle Rodriguez, PhD, Roberto Fenollosa, PhD, and Francisco Meseguer, Universidad Politécnica de Valencia

Silicon microspheres are described as UV, visible and infrared (IR) radiation filters. Parameters of these spheres including shape, smoothness, refractive index and size are examined for their potential benefits in cosmetic formulations. Finally, the ability of the spheres to block IR radiation is evaluated for thermo-regulatory effects.

Au Naturale Nanoparticle Sun Protection

Sep 1, 2010Katie Schaefer, Cosmetics & Toiletries

In 1876, Charles Darwin observed the secretion of yellow matter from the rootlets of ivy. Little was known about the material until 2008, when Mingjun Zhang, PhD, an associate professor of biomedical engineering at the University of Tennessee, and his research team found nanoparticles in the yellow matter.

Singlet Quenching Proves Faster is Better for Photostability

Feb 1, 2010Craig Bonda and Anna Pavlovic, The HallStar Company; Kerry Hanson and Chris Bardeen, University of California

The faster a photostabilizer works, the fewer opportunities for destructive chemical reactions. Here, the author describes a new photostabilizer, ethylhexyl methoxycrylene, which acts by quenching the singlet excited state of UV filters. The data shows how this material sets a new standard for the photostabilization of avobenzone, even in the presence of octyl methoxycinnamate.

Micron-sized Zinc Oxide Dispersion for Transparent High SPF Formula

Feb 1, 2010Paul McCormick, PhD, Antaria Ltd.; Robert Fletcher, PhD, and Charles Jones, PhD, Dow Home and Personal Care

Regulatory bodies require quantifiable, photostable UVA protection for sunscreens and while zinc oxide provides an effective option, historically, its white appearance on skin has limited its acceptance. Therefore, in the present article the authors explore a micron-sized zinc oxide dispersion technology to enable the formulation of transparent yet full spectrum sunscreen formulas.