The Preparation of Methyl Salicylate
Introduction: Esters have various smells that differ due to the types of carboxylic acids and alcohols one mixes together. This is called esterfication. The reaction is catalyzed by an inorganic acid usually H2SO4 Purpose: In this lab Methanol alcohol and Salicylic acid were reacted together to form Methyl Salicylate. This was done to determine the characteristic odour of the Methyl Salicylate. Safety: Safety goggles must be worn at all times.
Methanol: Toxic, may be fatal if inhaled, ingested or absorbed through skin. -Highly flammable: will be easily ignited by heat, sparks or flames. When handling Methanol: follow instructions issued by the instructor. - Wear safety equipment the instructor issues you.
-Work in a well ventilated room and under a fume hood to avoid vapours. - Understand and follow all safety practices and procedures told by the instructor. - Report any spills, leaks, ventilation errors or potential hazards to the instructor immediately. Salicylic acid: Toxic, causes severe eye irritation.
- Causes skin and respiratory tract irritation, may be harmful if swallowed. - May cause central nervous system effects.
- Light sensitive
- May cause reproductive and fetal effects.
When handling Salicylic acid: Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well-ventilated area. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation. Procedure:
1. Use a 125mL Erlenmeyer Flask fitted with one hole cork. Through the cork insert a reflux condenser. Place on top of a heating mantle while being supported by a retort stand and ring clamp, clamped to the reflux condenser. 2. Place 10mL of methanol, and 3g of salicylic acid, 20 drops of concentrated H2SO4 and a magnetic stir bar. 3. Heat the mixture until it is gently boiling. Continue heating for 20 minutes. Allow the apparatus to cool. Add 5mL of distilled...
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