(a) Melting point. 208[deg] to 210 [deg]C.
(b) Color. White powder.
(c) Taste. Bitter.
(d) Test. A solution of cinchonidine in dilute sulfuric acid shall not have more than a faint blue fluorescence (to distinguish from quinine and quinoidine). [T.D. ATF-133, 48 FR 24673, June 2, 1983. Redesignated by T.D. ATF-442, 66 FR 12854, Mar. 1, 2001]