27 C.F.R. § 21.112 – Heptane.

(a) Distillation range. No distillate should come over below 200 °F. and none above 211 °F.
(b) Odor. Characteristic odor.

[T.D. ATF-133, 48 FR 24673, June 2, 1983. Redesignated by T.D. ATF-442, 66 FR 12854, Mar. 1, 2001]