Not to direct this at you specifically, but there is a lot of misinformation and lack of information on these threads:
1) The gassed area was NOT held by ISIS, it was held by the al-Nusra Front. These are not nice people either, but almost certainly IF al-Nusra had Sarin, it would be from Syrian Army stockpiles.
2) Sarin degrades rather rapidly in storage, but the precursor chemicals do not degrade as quickly, therefor to use a stockpiled weapon, the two precursors are usually mixed in the weapon (such as by the spinning of a shell, rocket, or bomb in flight), or they are mixed shortly before the weapon is sent on its way.) If one blows up the warhead without said proper mixing, the amounts of lethal Sarin gas produced are typically minimal because the mixing is poor and many contaminants are introduced. (A very crude analogy would be setting two cups of “A” and “B” epoxy components and a grenade together, then detonating the grenade. Not much well cured epoxy will come out of that event.)
It is not impossible that rebels were mixing or had just mixed Sarin as the air attack occurred, but it is rather unlikely.
It is also not impossible that the rebels fired a Sarin warhead shell or rocket into the “strike” area as the air attack occurred, but this also seems unlikely, and would be very hard to plan for. More likely they would either be taking cover or operating what AA defenses they had.
3) Once deployed, Sarin on humans degrades and disperses fairly quickly, but not immediately. For example, clothing exposed to concentrated Sarin gas can release said gas at dangerous levels for roughly 30 minutes. In this particular instance (Khan Shaykhun attack), apparently some first responders DID die from or were affected by contact with initial victims.
https://en.wikipedia.org/wiki/Khan_Shaykhun_chemical_attack
However, after an hour or so, victims generally are relatively “safe” to handle, assuming the Sarin gas in the area itself has dissipated.
Good article on Sarin (which all FReepers should read, if they are not already familiar with the details of Sarin), here:
https://en.wikipedia.org/wiki/Sarin
Al nusra is al queda, usually an Isis ally.
They're not sure yet what it was. Some reports say chlorine.
It's not far fetched to believe that isis/al queda gassed civilians for propaganda purposes.
Why is gas worse that bombing, shooting, beheading, crucifying, burning people alive?
Is it worth going to war with Russia and Iran over?
>but there is a lot of misinformation and lack of >information on these threads:
there you go, confusing people with facts..