According to the report, the government of Syrian President Bashar Assad is responsible for the use of sarin in the Khan Sheikhoun incident, while the ISIL is responsible for the use of sulfur mustard
in Umm Hawsh.
He said: "My country's delegation is deeply concerned at the conclusion of the seventh report of the joint investigation mechanism between the Organization for the Prohibition of Chemical Weapons and the United Nations, which concluded without any doubt that the Syrian regime used sarine in the town of Khan Sheikhoun, Syria, on 4 April 2017, based on sufficient and reliable evidence and that Da'esh had used sulfur mustard
poison in Um-Housh on 15 and 16 September 2016.
The report also determined that the so-called Islamic State extremist group was responsible for using the chemical weapon sulfur mustard
on September 15 and 16, 2016 in Um-Housh, Syria.
The second phase, from July 2015 to January 2017, represents the enhanced capability the group had achieved by combining the production of sulfur mustard
agent with the means to deliver it using projectiles, such as mortar bombs and improvised rockets.
Further, ISIS has repeatedly used sulfur mustard
in chemical weapons attacks in Syria, as well as in Iraq.
An international inquiry by the United Nations and the Organisation for the Prohibition of Chemical Weapons (OPCW) has found Syrian government forces responsible for three toxic gas attacks and has said Islamic State militants have used sulfur mustard
forces had detected a sulfur mustard
agent on fragments of a shell that ISIS had fired against Kurdish forces earlier this month.
6(pp204-212)) In addition to being a vesicant, sulfur mustard
is also an alkylating agent.
France has also been pushing for a separate UN Security Council resolution after a joint investigation by the UN and the global chemical weapons watchdog OPCW found that Syrian government troops were responsible for two toxic gas attacks and ISIS militants used sulfur mustard
The third report, in August, blamed Syrian government troops for two chlorine gas attacks and Daesh militants for using sulfur mustard
Work to clarify certain aspects of the government's initial declaration about its weapons programme is ongoing; but 1,300 metric tons of chemical weapons, including sulfur mustard
and precursors for deadly nerve agents, have been accounted for and destroyed under the watchful eyes of OPCW inspectors.
Chemical warfare agents (CWA) such as sulfur mustard
(SM), a vesicant agent, were extensively used against the Iranian troops and civilians during 1983-1988.