Novichok: What Do We Know?

... weapons are classed under the VX category. Any agent more toxic than the VX class would inevitably have inferior combat parameters compared to that of the VX agents. Nevertheless, as previously reported, in April 2011 the Scientific Advisory Board at the OPCW reviewed the alleged Novichok agents whose structures had been included in Mirzayanov’s book and claimed to have toxicity exceeding that of VX. The board concluded “that there has been no confirmation of the author's claims”; it also confirmed ...