I have been to the UN web page on this treaty and there is no list of signatories with Israel's name on it, nor is it listed as such here.
The page to which I was referring was the Vienna Convention on the Law of Treaties. The reason this is important is that had Israel ratified the VCLT they would have had to abide by the Chemical Weapons Convention as a signatory. IOW, they are not bound by the Chemical Weapons Convention even if they are a signatory because they never ratified the Vienna Convention (neither did we, but we abide by it anyway, go figure).