4.6 Sodium hydroxide 0.1 mom/litre.
4.7 Sulphuric acid, 0.05 mol/litre.
4.8 Starch indicator 10 g /litre solution of soluble starch in water.
4.9 1 -Hexanol for use as antifoam.
4.10 Sidium hydrogen sulphite NaHSO 3
4.11 Iodine solution 0.025 mol/litre
4.12 Iodine solution 0.05 mol/liter.
4.13 Hydrochloric acid 35 to 38% m/m.
4.14 Sodium thiosulphate 0.1 mol/litre