Quote Originally Posted by Sarmatian View Post
Not everyone has access to the same technology. Even sarin made of low grade material has a shelf life of a few weeks. Better materials and stabilizing agents extend that to years and decades.

It is highly unlikely that sarin made by terrorists in field workshops is a quality binary variant. It is highly unlikely that they intend to store it for decades. It is highly unlikely that they have the means to make complicated firing mechanism necessary for effective deployment.

So, Kremlin story isn't illogical at all. Whether it's true, that's another issue.
Unitary Sarin (or similar) isn't easier to make than the binary form; it's the same chemical process, but storage of it in that form has been abandoned as it is too unstable. Why would anyone go back to that? The only way the Kremlin version could be true is if the airstrike hit at the very time the reagents had been mixed just before being used - in an unconventional form of munition since Syrians are used to dealing with the binary form. As I said before, it's possible that the rebel faction deliberately released poison gas in a 'false flag' operation, but nobody has claimed that.