In vitro biodurability of the product of thermal transformation of cement-asbestos

► Biodurability of thermally transformed cement-asbestos (KRY·AS) was determined. ► We call for a standardization of the biodurability tests. ► The biodurability in vitro of KRY·AS is lower with respect to that of chrysotile asbestos. ► The low potential toxicity of KRY·AS is demonstrated making its recycling safe.