74CHEMICAL COMPOSITION OF ESSENTIAL OIL - THYME VULGARIS (L.) LEAVESThe essential oil from leaves was isolated by hydrodistillation and analysed by gas chromatography coupled with mass spectrometry (GC-MS). The main components in leaves were Thymol (36.79%), O-cymene (24.68%), Linalool (2.87%), Cyclopropane,1-cyclopropylethynyl-2-methoxy-3,3 dimethyl (2.37%), Beta Cubebene (2.68%), Methyl thymol ether (1.63%),Humelene (1.02%). Thymol and O-cymene are the major constituents of volatile oil with 36.79% and, respectively 24.68%.nihararaji@gmail.comResearch512015Essential oil,Thyme vulgaris,GC-MSRajalakshmi AGDepartment of Biotechnology, Karpagam University, Coimbatore, Tamil Nadu, India.