• British Pharmacopoeia Volume V
  • Appendices
  • Appendix I A. General Reagents

Citric Acid

Citric Acid C6H8O7,H2O = 210.1 (5949-29-1)

Analytical reagent grade of commerce.

When used in the limit test for iron, Appendix VII, complieswith the following test.

Dissolve 0.5 g in 10 mL of water, add 0.1 mL of mercaptoacetic acid, mix, make alkaline with 10m ammonia and add sufficient water to produce 20 mL. No pink colour is produced.