A <link https: echa.europa.eu documents raaf_uvcb_report_en.pdf _blank>new document on using read-across for multi-constituent and unknown or variable composition, complex reaction products or biological materials (UVCB) substances describes key issues for assessing and addressing the complexity of read-across approaches for these substances.

More information can be found on <link https: echa.europa.eu fr how-to-consider-a-read-across-approach-for-multi-constituent-and-uvcb-substances _blank>ECHA’s website.