Powders The degree of coarseness or fineness of a powder is diffentiated and expressed by reference to the nominal mesh aperture size of the sieves used. The following terms are used in the description of powders: COARSE POWDER A powder […]
Gas Chromatography SUPPORTS Diatomaceous Support (Diatomaceous Earth; Siliceous Earth) White or almost white, fine granular powder made up of siliceous frustules of fossil diatoms or debris of fossil diatioms. It may be identified by microscopic examination with a magnification of x500.(Note Use a suitable grade available such as Celite 545.) Diatomaceous Support, Acid-washed Diatomaceous support that has […]
Acetic Anhydride-Sulfuric Acid TS A mixture of 9 volumes of acetic anhydride and 1 volume of sulfuric acid. Ammonia TS It contains 9.5 to 10.5 per cent w/w of NH3. Prepare by diluting 400 mL of strong ammonia solution with water to make 1000 mL. Store at a temperature not exceeding 20°. Ammonium Molybdate TS A 10.0 per cent w/v solution of ammonium molybdate. […]
Methyl Red C15H16ClN3O2 = 305.76 Dark red powder or violet crystals. Sparingly soluble in water; soluble in ethanol. Transition interval: from pH 4.2 to 6.3. Colour change: from red to yellow. Methyl Red TS Dissolve 10 mg of methyl red in 100 mL of ethanol, and filter if necessary. Phenolphthalein C20H14O4 = 318.33 White or faintly yellowish white, crystalline powder. Insoluble in water; soluble […]
In this Pharmacopoeia, all concentrations of volumetric solutions are expressed in terms of molarity. The molarity of a solution is stated as the number of moles of substance contained in 1000 mL of the solution. A solution which contains x moles of substance per 1000 mL is designated as x molar (x M). […]
the specifications given below are strictly for the use of the materials as reagents. The inclusion of a material in this Appendix does not imply that it is suitable for use in medicines. Exceptionally, a trademark or supplier may be indicated for certain reagents whose availability is limited. It is however acceptable to use reagents […]
