824-72-6 AI3-15064 Benzenephosphonic dichloride Benzenephosphonodichloridic acid Benzenephosphonyl chloride Dichlorophenylphosphine oxide EINECS 212-534-3 NSC 66477 Phenyldichlorophosphine oxide Phenylphosphonic acid dichloride Phenylphosphonic dichloride Phenylphosphonodichloridic acid Phenylphosphonyl dichloride Phosphonic dichloride, phenyl-