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

1,4-Dioxan
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1,4-Dioxan Dioxan; C4H8O2 = 88.11 (123-91-1)

Clear, colourless liquid, miscible with water and with most organic solvents.

bp2013_v5_47_1003_[appendix_i_a]_d_ep7-7_ep_revised_texts d_20_20.png, about 1.03; freezing point, 9° to 11°.

Water (2.5.12), maximum 0.5%.

Do not distil if the dioxan does not comply with the test for peroxides.

Peroxides Place 8 mL of potassium iodide and starch solution in a 12 mL ground-glass-stoppered cylinder about 1.5 cm in diameter. Fill completely with the substance to be examined, shake vigorously and allow to stand in the dark for 30 minutes. No colour is produced.

Dioxan used for liquid scintillation is of a suitable analytical grade.