Iupac defends contested project to redefine PFAS
By 
Rebecca Trager2025-09-09T13:30:00
The organisation wants to standardise terminology for per- and poly-fluoroalkyl substances, but some experts fear new definitions could harm environmental protections
A controversial project to redefine the family of environmentally persistent chemicals known as per- and poly-fluoroalkyl substances (PFAS) continues to divide opinions among the chemistry community. While some believe that standardising the language used to define PFAS will enable clearer and more effective regulation of the substances, others are concerned that any new definitions will be too narrow and have questioned the motives of those behind the initiative.