And that somehow makes it OK?
“And that somehow makes it OK?”
Uh, no. The question at issue was what kind of chemical agent was involved. Some of the cheaper ones contain blistering agents, and thus may be more readily employed. A more toxic — and more difficult — weapon to manufacture and control would be a non-burn producing chemical such as VX (at least, it would not produce burns that were similar to the ones shown in the photos). VX and sarin have a far greater capacity to inflict fatalities than, say, mustard gas.