p-Dimethylaminobenzalrhodanine
Title: p-Dimethylaminobenzalrhodanine
CAS Registry Number: 536-17-4
CAS Name: 5-[[4-(Dimethylamino)phenyl]methylene]-2-thioxo-4-thiazolidinone
Additional Names: 5-[p-(dimethylamino)benzylidene]rhodanine
Molecular Formula: C12H12N2OS2
Molecular Weight: 264.37
Percent Composition: C 54.52%, H 4.58%, N 10.60%, O 6.05%, S 24.26%
Literature References: Prepn: Mackie, Misra, J. Chem. Soc. 1954, 3919.
Properties: Deep red needles from xylene, dec 270°, also reported as dec 246°. Sintering ~260° and melting ~280°. Practically insol in water. Very slightly sol in chloroform, ether, benzene; slightly sol in boiling alc; moderately sol in acetone; sol in strong acids with a yellow color.
Melting point: melting ~280°
Use: As 0.03% soln in acetone for detection of silver, mercury, copper, gold, platinum and palladium ions.

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