VI. List of the Elements and Principal Pharmacopoeial Chemicals With their Atomic or Molecular Weights and a Table of Multiples NOTE. This list contains the official chemicals and reagents of a definite composition, and also a few that are not official, but which are likely to be required in stoichiometrical calculations. The figures in the list given below are based upon the Table of International Atomic Weights, with Hydrogen taken as the unit. The elementary substances are also given in a separate list (see page 596). In the case of a few salts, for which this Pharmacopoeia has given no formula on account of the difficulty of securing an absolutely uniform composition, the theoretical formula has been inserted merely for information. And in the case of many hydrated compounds the formula and molecular weight of the corresponding anhydrous compound have also been given, to save time in calculations. |