Hi, My Wife Drank Harpic (toilet Cleaner) She Was Admitted

hi,
my wife drank harpic (toilet cleaner) she was admitted in hospital but her father didnt revealed that she drank harpic instead he said she is having chest pain. She actually was having chest pain when admitted to hospital but my father in law due to my fear didnt told about harpic.

she also had anxiety and panic attack problem from past 2 years

after doctor examined and started treatment few hour later they said she is recovering and will be shifted to general ward but same day after few hour again some problem started and then put on ventilationshe was given anesthesia to rest and next day she died.

i know its my father in law mistake he never told the doctor about harpic and what made her drink that shit.
in death certificate doctor wrote it was by suffocation.

i just need to know if my father in law would have told the doctor could she be saved.
please docter i need to know