Page 99 - phytochemistry I - PharmD Clinical

Source: Oil of Thymus capitatis.

Color reaction:

Carvacrol in a very concentrated a!coholic solution develops a green

color.

Uses:

Carvacrol like thymol, is powerful antiseptic and germicidal in oral

preparations.

Determination of phenol content:

In a cassia flask, an accurately measured volume of the oil is shaken

vigorously with a portion of aqueous caustic alkali, and a further quantity

of the alkali is then added to bring the un-dissolved oil into the graduated

neck of the flask when the liquid have separated and become clear, the

volume of the oil insoluble in alkali is read, the volume of the phenol being

determined by difference.

2.6. Phenolic ethers:

Anethole

Source:

Anise, fennel and star anise oils.

Uses:
Anethole is used widely for flavouring mouth washing and gargle.

Flavoring in foods and beverages.

۹۷