Division II.4 REAGENTS United Kingdom Original text. Later amendments are not shown. All reagents used shall be chemically pure. II.4.1Division II.4.1 II.4.2Division II.4.2 II.4.3Division II.4.3 II.4.4Division II.4.4 II.4.5Division II.4.5 II.4.6Division II.4.6 ← Division II.3.7 Division II.4 Division II.4.1 →