SULPHUR DIOXIDE
This is an irrespirible gas with the odour of burning sulphur. It is a preservative and bleaching agent, is used for disinfection, and occurs in certain industries.
The inhalation of the fumes causes a feeling of suffocation, with spasm of the glottis, and irritation of the nose, trachea, and bronchi, producing sneezing and cough; opacity of the cornea, dyspnœa, cyanosis, and convulsions may occur.