Workers at a package delivery company in Başiskele district experienced difficulty in breathing after a package containing sodium benzoate burst open in the factory.
The workplace was evacuated after the chemical spread.
Ambulances were dispatched to the company and the workers were taken to the Derince Education and Research Hospital for treatment. The workers were admitted to the hospital's Chemical Biological Radiological and Nuclear (CBRN) center, where special measures were taken.
The hospital cleaned the workers of chemical remnants and distributed fresh clothing to affected individuals, while blood samples were taken.
The chief physician at the hospital, Dr Soner Şahin, announced that 40 workers had been discharged, while the treatment of 14 patients is ongoing.