The National Toxics Network (NTN) calls on federal and state governments to implement a moratorium on the use of hydraulic drilling and fracturing chemicals (‘fracking chemicals’) used in the hydraulic drilling and fracturing of coal gas seams and gas shale extraction, until the fracking chemicals have been fully assessed for their health and environmental hazards by the industrial chemicals regulator, the National Industrial Chemical Notification and Assessment Scheme (NICNAS). NTN’s assessment has found that only 2 out of the 23 most commonly used fracking chemicals in Australia have been assessed by NICNAS. Neither of these 2 chemicals have been specifically assessed for their use in hydraulic drilling and fracking.