Structure and Uses of Carboxylic Acids

Structure and Uses of Carboxylic Acids

Contents

• Structure and uses of carboxylic acids

Learning Objectives

At the end of this lecture, student will be able to

• Explain the qualitative tests for carboxylic acids

• Write the structure and uses of carboxylic acids

Acetic acid

Structure

• Systematically ethanoic acid

• Undiluted- glacial acetic acid

• Vinegar- roughly 3-9% acetic acid

Uses

• Chemical reagent

• Good solvent, recrystallization solvent

• Analytical titrations

Lactic Acid

Structure

Use

– Pharmaceutical aid as tablet & capsule diluent

– In topical preparations and cosmetics to adjust acidity

– Disinfectant

– Keratolytic

Tartaric Acid

Structure

Use

– Pharmaceutical aid (buffering agent)

Citric Acid

Structure

• Organic tricarboxylic acid

Use

– Pharmaceutical aid

– Anticoagulant for the storage of whole blood

– Acidifier, flavoring and chelating agent

Succinic acid

Structure

• Dicarboxylic acid

Uses

• Precursor to polymers, resins and solvents

• Food additive and dietary supplement

• Flavoring agent, acidity regulator

Oxalic acid

Structure

• Simplest dicarboxylic acid

Uses

• Reducing agent, chelating agent

• Cleaning or bleaching, especially for removal of rust

• Dye fixative

Salicylic Acid

Structure

Use

– Keratolytic

Benzoic acid

Structure

• Simple aromatic carboxylic acid

Uses

• Production of phenols by oxidative decarboxylation at 300-400 0C

• Precursor to plasticizers, sodium benzoate and other preservatives

• Constituent of Whitefield’s ointment- fungal skin diseases

• As expectorant, analgesic, and antiseptic

Benzyl Benzoate

Structure

Use

– Anti parasitic (scabicide)

Dimethyl Phthalate

Structure

Use

– Insect repellant (skin application)

Methyl Salicylate

Structure

Use

– Counter irritant and pharmaceutical aid

Acetyl salicylic acid

Structure

Use

– Analgesic and antipyretic

Summary  

• Acetic acid is a good solvent

• Citric Acid

• Anticoagulant for the storage of whole blood

• Methyl Salicylate is Counter irritant and pharmaceutical aid

• Acetyl salicylic acid is analgesic and antipyretic

Post a Comment

0 Comments