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Determination of Melting Point of Novel Schiff Base Derivatives of Benzothiazepine by Open Capillary Method (CAT#: STEM-PPA-0082-YJL)

Introduction

As estimated by WHO, depression shall become the second largest illness in terms of morbidity by another decade in the world; already one out of every five women, and every twelve men have depression. Not only adults, but two percent of school children, and five percent of teenagers also suffer from depression, and these mostly go unidentified. Depression has been the commonest reason why people come to a psychiatrist, although the common man's perception is that all psychological problems are depression. Current treatments for depression either fail to produce recovery or induce unwanted side effects. So there is still a large unmet clinical need. The main aims in the development of new antidepressants are greater efficacy, absence of side effects, lack of toxicity in over dose and earlier onset of action.




Principle

Melting point is a characteristic property of solid crystalline substance. It is the temperature at which the solid phase changes to the liquid phase. This phenomenon occurs when the substance is heated.
In all major pharmacopoeias the open capillary method is described to determine the melting point (slip point) for fats, fatty acids, paraffin, and waxes. In a glass capillary tube open at both ends (1), 10 mm of sample is introduced (2), chilled to a given temperature and immersed into a water bath (3/4). The melting point with open capillary, also known as slip point or slip melting point, is the temperature at which the substance begins to rise in the capillary due to the effect of the increasing temperature and buoyancy.

Applications

Chemical industry; Cosmetic/pharmaceutical industry

Procedure

1. Prepare the substance.
2. Affix one of the capillaries to a thermometer.
3. Place the thermometer with an affixed capillary into a glass.
4. Increase the temperature.

Materials

• Sample Type: crystalline compounds