2-Chloro-1-methylethylphosphonic acid bis(2-chloro-1-methylethyl) ester 7316-55-4 Bis(2-chloro-1-methylethyl) (2-chloro-1-methylethyl)phosphonate Bis-(2-chloroisopropyl)-2-chloro-isopropyl phosphonate EINECS 230-779-4 Phosphonic acid, (2-chloro-1-methylethyl)-, bis(2-chloro-1-methylethyl) ester