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Homepage>BS Standards>71 CHEMICAL TECHNOLOGY>71.100 Products of the chemical industry>71.100.70 Cosmetics. Toiletries>20/30373979 DC BS EN ISO 24443. Determination of sunscreen UVA photoprotection in vitro
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immediate downloadReleased: 2020-05-05
20/30373979 DC BS EN ISO 24443. Determination of sunscreen UVA photoprotection in vitro

20/30373979 DC

BS EN ISO 24443. Determination of sunscreen UVA photoprotection in vitro

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Standard number:20/30373979 DC
Pages:42
Released:2020-05-05
Status:Draft for Comment
DESCRIPTION

20/30373979 DC


This standard 20/30373979 DC BS EN ISO 24443. Determination of sunscreen UVA photoprotection in vitro is classified in these ICS categories:
  • 71.100.70 Cosmetics. Toiletries

This document specifies an in vitro procedure to characterize the UVA protection of sunscreen products. Specifications are proposed to enable determination of the spectral absorbance characteristics of UVA protection in a reproducible manner.

In order to determine relevant UVA protection parameters, the method has been created to provide an UV spectral absorbance curve from which a number of calculations and evaluations can be undertaken. Results from this measurement procedure can be used for other computations, as required by local regulatory authorities. These include calculation of the Ultraviolet-A protection factor (UVA-PF) [correlating with in vivo UVA-PF from the persistent pigment darkening (PPD) testing procedure], critical wavelength and UVA absorbance proportionality. These computations are optional and relate to local sunscreen product labelling requirements. This method relies on the use of static in vivo SPF results for scaling the UV absorbance curve.

This document is not applicable to powder products such as pressed powder and loose powder products.