It’s been a while, but here’s a November report from the UN Investigative Team to Promote Accountability for Crimes Committed by Da’esh/Islamic State in Iraq and the Levant. It contains new information about ISIL’s “development and use of chemical and biological weapons.”
Evidence suggests that ISIL manufactured and produced chemical rockets and mortars, chemical ammunition for rocket-propelled grenades, chemical warheads and improvised explosive devices. Furthermore, the ISIL programme involved the development, testing, weaponization and deployment of a range of agents, including aluminium phosphide, chlorine, clostridium botulinum, cyanide, nicotine, ricin and thallium sulphate.
A longer excerpt: