8References to concentration, strength or quantity of substances

8  References to concentration, strength or quantity of substances

  In this instrument, for a reference to a concentration, strength or quantity of a substance:

 (a) if the substance is present as a salt, active principle or derivative (including an ester or ether), the concentration, strength or quantity is calculated as the equivalent amount of the substance; and

 (b) the expression “1%” means:

 (i) in the case of a liquid preparation, 1 g of the substance per 100 mL of the preparation; or

 (ii) in the case of a solid, semi‑solid or pressurised spray aerosol preparation, 1 g of the substance per 100 g of the preparation; and

 (iii) any expression of greater or lesser percentages shall have a corresponding meaning; and

 (c) in the case of codeine, such concentration, strength or quantity is calculated as anhydrous codeine.