Inorganic UV filters

Eloísa Berbel Manaia,Leila Aparecida Chiavacci,Renata Cristina Kiatkoski Kaminski,Marcos Antonio Corrêa

doi:10.1590/s1984-82502013000200002

Eloísa Berbel Manaia, Leila Aparecida Chiavacci + Show 2 more

Open Access

https://doi.org/10.1590/s1984-82502013000200002

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Abstract

Nowadays, concern over skin cancer has been growing more and more, especially in tropical countries where the incidence of UVA/B radiation is higher. The correct use of sunscreen is the most efficient way to prevent the development of this disease. The ingredients of sunscreen can be organic and/or inorganic sun filters. Inorganic filters present some advantages over organic filters, such as photostability, non-irritability and broad spectrum protection. Nevertheless, inorganic filters have a whitening effect in sunscreen formulations owing to the high refractive index, decreasing their esthetic appeal. Many techniques have been developed to overcome this problem and among them, the use of nanotechnology stands out. The estimated amount of nanomaterial in use must increase from 2000 tons in 2004 to a projected 58000 tons in 2020. In this context, this article aims to analyze critically both the different features of the production of inorganic filters (synthesis routes proposed in recent years) and the permeability, the safety and other characteristics of the new generation of inorganic filters.

Highlights

Concern about skin cancer preoccupation has been growing more and more, in tropical countries where the ultraviolet (UV)A/B radiation is stronger
The correct denomination of UV filters is inorganic and organic, because both of them are chemical products differing in their molecular composition and physical and chemical terms refer to the action mode of the UV filters (Morabito et al, 2011)
The most frequently used inorganic UV filters are titanium dioxide (TiO2) and zinc oxide (ZnO). These oxides have been prepared in nanometric particles, which show the least reflection of visible radiation, producing less effect of white coloration when applied to the skin, and have special properties from the viewpoint of photoprotective efficacy

Summary

Inorganic UV filters

Eloísa Berbel Manaia, Renata Cristina Kiatkoski Kaminski, Marcos Antonio Corrêa, Leila Aparecida Chiavacci1,*. The ingredients of sunscreen can be organic and/or inorganic sun filters. The estimated amount of nanomaterial in use must increase from 2000 tons in 2004 to a projected 58000 tons in 2020 In this context, this article aims to analyze critically both the different features of the production of inorganic filters (synthesis routes proposed in recent years) and the permeability, the safety and other characteristics of the new generation of inorganic filters. O uso correto de protetores solares é a forma mais eficaz de prevenir o aparecimento desta doença. Os ativos utilizados em protetores solares podem ser filtros orgânicos e inorgânicos. Entretanto, em razão de apresentarem alto índice de refração, os ativos inorgânicos conferem aos protetores solares aparência esbranquiçada, diminuindo sua atratividade estética.

INTRODUCTION

SKIN CANCER AND SUN RADIATION

Findings

ORGANIC X INORGANIC UV FILTERS