volatile oils PH103.10

Recap In the previous class, you learnt about Lipids Fixed Oils & Fats Waxes PH103.10

On the completion of this period, you would be able to know about Objectives On the completion of this period, you would be able to know about Volatile oils Examples of volatile oils Uses PH103.10

Volatile Oils Volatile oils are responsible for odour of the crude drugs They evaporate when exposed to air at normal temperature They are Liquid or solids Volatile Possess characteristic odour Volatile oils are insoluble in water PH103.10

Volatile oils Soluble in ether, alcohol, chloroform and benzene In plants they attract insects to help in cross pollination Act as insect repellant to prevent their destruction Volatile oils have high refractive index & exhibit optical rotation PH103.10

Volatile oils are found in various plant organs like Flower petals Rose Fruits Fennel Leaves Eucalyptus Bark Cinnamon Woods Sandalwood Buds Cloves Volatile oils solid at room temperature Camphor, Thymol, Menthol PH103.10

Volatile Oils In plants volatile oils are formed In specialised secretory cells / ducts / hair / canals Such as glandular hairs Vittae of umbelliferous fruits Schizogenous ducts Lysigenous ducts Schizolysigenous ducts Cavities PH103.10

Volatile Oils Chemically they contain terpene derivatives like alcohols, aldehydes, phenols etc., They can be obtained from Plant parts by Steam distillation Fresh volatile oils are colourless liquids Cannot be hydrolysed / saponified PH103.10

Volatile oils They may used as Anti fungal Antiseptic Some of them have mild local anesthetic Analgesic action PH103.10

Volatile Oils and Terpenoidal Drugs Volatile oils are extracted by Steam-distillation Solvent extraction Enfleuage This method is used for extraction of delicate perfumes 4.Ecuelle This method is used for extraction of citrus oils. PH103.10

Examples of volatile oil Summary In this class we learnt about Volatile oils Examples of volatile oil Uses PH103.10

Quiz 1.Phenolic volatile oil is present in Coriander Caraway Asafoetida All the above PH103.10

Quiz 2. Dental analgesic activity is present in Coriander oil Clove oil Lavender oil Rose oil PH103.10

Frequently Asked Questions Explain what are volatile oils. How they are obtained from different sources? Write examples 2. What are the uses of volatile oil PH103.10