27 CFR § 21.108-T
Ethyl tertiary butyl ether
April 24, 2020
(a) Purity. ≥95.0 percent.
(b) Color. Colorless to light yellow.
(c) Odor. Terpene-like.
(d) Specific gravity at 20 °C. 0.70 to 0.80.
(e) Boiling point ( °C). 73.
[T.D. TTB-140, 81 FR 59462, Aug. 30, 2016]
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