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

2,2,4-Trimethylpentane

2,2,4-Trimethylpentane Iso-octane; trimethylpentane; C8H18 = 114.2 (540-84-1)

General reagent grade of commerce.

A colourless, flammable liquid; bp2012_v5_46_020_[appendix_i_a]_t_revised_texts_ep7-3 d_20_20.png, 0.691 to 0.696; bp2012_v5_46_020_[appendix_i_a]_t_revised_texts_ep7-3 n_20_d.png, 1.391 to 1.393.

Complies with the following test.

Distillation range Not less than 95% distils between 98° and 100°.

2,2,4-Trimethylpentane used in spectrophotometry complies with the following additional test.

Transmittance Not less than 98% between 250 and 420 nm, Appendix II B, using water in the reference cell.