Dicyclohexyl phosphorofluoridate

Dicyclohexyl phosphorofluoridate (DCFP), also known as TL-941 or T-1840, is an extremely toxic organophosphorus compound with powerful anticholinesterase action. It's a colorless liquid that is extremely resistant to hydrolysis. DCFP can be produced by reaction of cyclohexanol with phosphoryl dichloride fluoride.