p-Dimethylaminobenzaldehyde
Title: p-Dimethylaminobenzaldehyde
CAS Registry Number: 100-10-7
Additional Names: 4-Dimethylaminobenzenecarbonal; Ehrlich's reagent
Molecular Formula: C9H11NO
Molecular Weight: 149.19
Percent Composition: C 72.46%, H 7.43%, N 9.39%, O 10.72%
Literature References: Prepd by formylation of dimethylaniline with dimethylformamide: Campaigne, Archer, Org. Synth. coll. vol. IV, 331 (1963).
Properties: Small granular crystals or leaflets from alcohol + water. Unless extremely pure, the crystals are lemon-colored and may turn pink on exposure to light. mp 74°. bp17 176-177°. Slightly sol in water; sol in alcohol, ether, chloroform, acetic acid, many other organic solvents.
Melting point: mp 74°
Boiling point: bp17 176-177°
 
Derivative Type: Hydrochloride
Properties: Crystals, mp 109°.
Melting point: mp 109°
 
Use: Manuf dyes; reagent for arsphenamine, anthranilic acid, antipyrine, indole, skatole, indican, tryptophan, albumin, ergot alkaloids, colon bacteria, typhoid coli; for differentiating between serum eruptions and true scarlet fever.

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