1582-27-0 16921-85-0 4-Chlorobenzenediazonium hexafluorophosphate Benzenediazonium, 4-chloro-, hexafluorophosphate(1-) Benzenediazonium, p-chloro-, hexafluorophosphate(1-) EINECS 216-429-3 p-Chlorobenzenediazonium hexafluorophosphate