Determination of the critical wavelength

Critical wavelength determination analysis is used to evaluate the effectiveness of UV filters in sunscreen products.

The critical wavelength (CWL) is measured by UV spectrophotometry to determine the protection spectrum.

It allows the “broad spectrum” character to be established according to regulatory criteria (e.g. ISO 24443).

At YesWeLab , we collaborate with a carefully selected network of laboratories, most of which are certified and/or accredited (ISO 17025, COFRAC, etc.). These laboratories are chosen based on your specific needs, the matrices to be analyzed, and the required analytical techniques or methods.
If you have any particular requirements, please do not hesitate to specify them in your request: our scientific team will do everything possible to respond accurately and promptly.
Since 2020, numerous manufacturers, distributors, and engineering firms have entrusted us with the management of their analyses, sending us their samples through our digital platform.
To learn more or submit a specific request, contact our team today.