Solution melting point

Solute Melting Point (°C) Fused Ring Number Molecular Connectivity (x) k(SFC) [C18] Retention Index OV-101... 

Freezing point depression 0.14°C (1% w/v aqueous solution) Melting point decomposition at 252°C for the dihydrate. Refractive index 1.33 (1% w/v aqueous solution)... 

Acidity/alkalinity pH = 13.5 (0.1 M aqueous solution) Melting point 360°C 380°C when anhydrous Solubility see Table II. 

Physicochemical Properties. These include pH of aqueous solution, melting point, and refractive index. Tests in this category should be determined by the physical nature of the drug substance and its intended use. 

These are properties, such as the pH of an aqueous solution, melting point/range, and refractive index. The procedures used for the measurement of these properties are usually unique and do not need much elaboration, for example, capillary melting point and Abbe refractometry. The tests performed in this category should be determined by the physical nature of the new drug substance and its intended use. 

Using Flory-Huggins theory it is possible to account for the equilibrium thermodynamic properties of polymer solutions, particularly the fact that polymer solutions show major deviations from ideal solution behavior, as for example, the vapor pressure of solvent above a polymer solution invariably is very much lower than predicted from Raoult s law. The theory also accounts for the phase separation and fractionation behavior of polymer solutions, melting point depressions in crystalline polymers, and swelling of polymer networks. However, the theory is only able to predict general trends and fails to achieve precise agreement with experimental data. 

The physical properties of a particular type of matter are those properties of the substance that do not involve a chemical reaction. Examples are state (solid, liquid, gas or in solution), melting point, boiling point, colour and electrical conductivity. 

Thin layer chromatography was carried out on aluminium-backed plates precoated with silica (0.2 mm, 60 F254, Merck). The plates were developed using UV light and basic potassium permanganate solution. Melting points were recorded... 

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