This document discusses various chemical hazards found in pharmaceutical industries. It describes hazards associated with sulphonating agents like fuming sulphuric acid which can cause corrosion. Organic solvents like acetone, acetonitrile, toluene and xylene are commonly used but pose health risks if inhaled or absorbed in high quantities. Control measures for chemical hazards include designated areas, engineering controls like ventilation, exhaust systems and fume hoods. Personal protective equipment including protective clothing, gloves and respirators are also recommended. Proper storage, labeling and limiting lone work with hazardous chemicals can help manage risks.