27 CFR § 21.118-T1
Methyl tertiary butyl ether
April 24, 2020
(a) Purity. ≥ 97.0 percent.
(b) Color. Clear, colorless.
(c) Odor. Turpentine-like.
(d) Specific Gravity at 20 °C. 0.70 to 0.80.
(e) Boiling Point ( °C). 55.
[T.D. TTB-140, 81 FR 59462, Aug. 30, 2016]