apart from political game what I can say is  if the chimical was used to attack they are not 

1. Sulphur mustard, Nitrogen Mustard , lewisite and phosphorous oxime, Because they are  produce blister ( agoo le pole ra niklane panii ko foka jasto) . At leaset I dont see any blister on the  body of the ppl suffering from attack.
2. The chemical is very unlikely VX (highly toxic chemical usedas chemical weapons) . Because VX causes very severe sivering and immidiate death. even at very l;ow concentration. Besides  USA knowes which chemical wepaons Syria has. VX is difficult to produce and because of its high toxicity difficult to store.

3. Looking at the ppl who are said to be suffering from attack it  does not look like sarine,( commonly used chemical weapon) and easy to produce. Japanese cult Aum shinorikyo produced it and used in Tokyo subway station in Japan in 1995. Because no running nose ( Ryal, sigan)
But the pupil were dilated which is one of the many sign of the organophorous chemical weapons. Sarine is also a voltaile chemical in summer it will be evaporated quickly.

dilation of the pupil can be caused by many toxic chemicals, these chemicals can be packed in rocket and fired at. This is summer so any chemical will evaporated immidiately.

Now UN Inspectors have collected soil sample and probbaly blood sample too, which could be naanlysed in lab to find out the chemical.