Kim Jong-Nam was Assassinated with a Binary Version of VX
As many of you must have heard by now, Kim Jong-Nam (the elder brother of the current North Korean leader Kim Jong-Um) was assassinated about 10 days (on 13 February 2017) by two women spraying something toxic on his face. Since that day, there has been much speculation about the identity of the toxic substance in the sprays which killed him. This was especially so because the two women who were paid to spray him were themselves unskilled locals who were unaffected by whatever they used on him. However that very fact that two sprays were used seemed to suggest that the toxic compound was a binary chemical agent- most likely a never gas.
It seems that this particular theory has now been confirmed. Earlier today, the Malaysian police announced that preliminary tests show that Kim Jong-Nam was killed by a potent nerve gas known as VX. So why does the use of VX suggest that it was generated in situ by a binary chemical reaction– apart from two women spraying him with stuff that did not kill them? Well.. because VX is highly toxic and has certain physical properties (high viscosity and low volatility) which make its use as a gas or spray really problematic- especially if an actual human being is doing the spraying. However it is far easier to use as binary chemical weapon because both components of the binary mix (QL and Sulfur) are fairly safe by themselves.
The structure of VX and QL as well as the general schematics of the chemical reaction which generates VX from QL and Sulfur are shown below. The short version of the story is that QL reacts with Sulfur to generate an intermediate compound which then undergoes a slight chemical rearrangement to form VX.
As you can see, the reaction is fairly simple and the two components which generate VX in situ are themselves fairly non-toxic. While there have a few isolated incidents in the past 2-3 decades (link 1, link 2, link 3) of people using weaponized organophosphate compounds aka ‘nerve gases’ to kill a few people- this incident is perhaps the first the first one to use a binary chemical agent for assassinating a public figure of any significance.
Update: It is possible that the North Koreans might have used the binary version of another structurally similar compound or a different organophosphate ‘nerve gas’ such as Sarin.
What do you think? Comments?