The incident took place when Gautam Mondal got into a scuffle with his wife at Habra Hospital, where their six-year-old son was admitted with diarrhoea, Additional Superintendent of Police Bhaskar Mukherjee said.
Mondal was carrying a bottle of muriatic acid which he had purchased from a local shop, he said, adding, during the quarrel the acid bottle broke in which his wife, and mother-in-law sustained minor burn injuries.
A hospital employee was also injured during the incident, Mukherjee said.