(a) Odor. Characteristic odor.
(b) Specific gravity at 15.56 [deg]/15.56 [deg]C. Not more than 0.728. [T.D. ATF-133, 48 FR 24673, June 2, 1983. Redesignated by T.D. ATF-442, 66 FR 12854, Mar. 1, 2001]