27 CFR § 21.112-T1 - Hexane (mixed isomers).

(a) General. Minimum 55 percent n-hexane.

(b) Distillation range. No distillate should come over below 150 °F and none above 160 °F.

(c) Odor. Characteristic odor.

[T.D. TTB–140, 81 FR 59462, Aug. 30, 2016]