By Porter Wright on The NanoSafety Consortium for Carbon just submitted a proposed toxicity testing agreement to EPA under Section 4 of the Toxic Substances Control Act covering a range of nanoscale materials including multi-walled carbon nanotubes, double-walled carbon nanotubes, single-walled carbon nanotubes, and graphene. Key elements for the curious: The chemical substances to be tested … Continue Reading
By Porter Wright on California’s Department of Toxic Substances Control (CDTSC) held a conference today during which they identified the next six nanoscale materials they intend to target in their second round of data call ins. Regular readers may remember that CDTSC targeted 26 manufacturers/importers of carbon nanotubes with its first data call in in 2009. In addition to … Continue Reading
By Porter Wright on The NanoSafety Consortium for Carbon has recently posted a bibliography of in vivo tox studies on its website. The bibliography is (obviously) a work in progress. We would greatly appreciate it if our readers would bring to our attention any pertinent articles that are not already on the bibliography. The articles will be used to inform … Continue Reading
By Porter Wright on A recent in vivo study published in NanoLetters focuses on the impact of ultraviolet radiation on the ability of Quantum Dots (QD) to penetrate skin. L. Mortensen, et al., "In Vivo Skin Penetration of Quantum Dot Nanoparticles in the Murine Model: The Effect of UVR," NanoLetters, Vol. 8, No. 9, pp. 2779-2787 (August 2008). The … Continue Reading
By Porter Wright on Recent experiments involving "in vivo" testing of C-60 fullerenes, or "buckyballs" appears to conflicts with prior, "in vitro" tests and shows that the nanomaterials may not be toxic when inhaled. Scientists at DuPont conducted experiments on lab rats by implanting the C-60 compound into the rats’ tracheas and then looked for signs of damage.… Continue Reading
By Porter Wright on The December 4, 2006 on-line edition of the Proceedings of the National Academy of Sciences is set to publish findings from a recent in vivo animal study researching the possible health effects of SWCNTs deliberately injected into the bloodstream. Scientists at Rice University and the University of Texas are said to have found that carbon nanotubes are … Continue Reading
