<unk>  (military code Q, also known as One-and-one-half mustard) is a vesicant chemical weapon, a type of mustard gas. In its pure form it is more toxic and has up to five times the potency as a vesicant compared to standard mustard gas, though it is a solid at room temperature and so was only ever deployed as mixtures with the original mustard, with phosgene, or as a solution. Since 1997, it has been listed under Schedule I of the Chemical Weapons Convention, as a substance with few uses outside of chemical warfare (although since then, it has been found to be useful in chemotherapy).
Sesquimustard
Enarodustat
Truenat
Erteberel
Veristrat
Patiromer
Androvax
Lazaretto