2-Amino-4,6-dichlorophenol
Title: 2-Amino-4,6-dichlorophenol
CAS Registry Number: 527-62-8
Additional Names: 2,4-Dichloro-6-aminophenol; 4,6-dichloro-o-aminophenol
Molecular Formula: C6H5Cl2NO
Molecular Weight: 178.02
Percent Composition: C 40.48%, H 2.83%, Cl 39.83%, N 7.87%, O 8.99%
Literature References: Prepd by reduction of the corresponding nitrophenol: F. Fischer, Z. Chem. [N.F.] 4, 386 (1868); Ann. Suppl. 7, 189 (1870); Katz, Cohen, J. Org. Chem. 19, 758 (1954). Purification: J. Meyer, Helv. Chim. Acta 41, 1890 (1958).
Properties: Long needles from carbon disulfide, warts from benzene, mp 95-96°. Sublimes (0.06 torr) 70-80° (bath temp). Freely sol in benzene, somewhat less in carbon disulfide, much less in petr ether. The stability of the free base (snow-white when pure) seems to be impaired by impurities.
Melting point: mp 95-96°
 
Derivative Type: Hydrochloride
Molecular Formula: C6H5Cl2NO.HCl
Molecular Weight: 214.48
Percent Composition: C 33.60%, H 2.82%, Cl 49.59%, N 6.53%, O 7.46%
Properties: Crystals, dec 280-285°. Very stable when pure. The commercial product may be dark brown. Sol in water, alcohol. Precipitated from aq soln by the addition of concd HCl.
 
Use: Important azo-dye intermediate.

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