Title: Sulphan Blue
CAS Registry Number: 129-17-9
CAS Name: N-[4-[[4-(Diethylamino)phenyl](2,4-disulfophenyl)methylene]-2,5-cyclohexadien-1-ylidene]-N-ethylethanaminium inner salt, sodium salt
Additional Names: C.I. Acid Blue 1; [4-[a-[p-(diethylamino)phenyl]-2,4-disulfobenzylidene]-2,5-cyclohexadien-1-ylidene]diethylammonium hydroxide inner salt sodium salt; anhydro-4,4¢-bis(diethylamino)triphenylmethanol-2¢¢,4¢¢-disulfonic acid monosodium salt; C.I. Food Blue 3; C.I. 42045
Trademarks: Disulphine Blue (Zeneca)
Molecular Formula: C27H31N2NaO6S2
Molecular Weight: 566.66
Percent Composition: C 57.23%, H 5.51%, N 4.94%, Na 4.06%, O 16.94%, S 11.32%
Literature References: Prepn from 4-formylbenzene-1,3-disulfonic acid and diethylaniline: Colour Index vol. 4 (3rd ed., 1971) p 4382.
Properties: Violet powder. One gram dissolves in 20 ml water at 20°. Dilute aq solns are blue and turn yellow upon the addition of concd hydrochloric acid. In the absence of strong acid or caustic the blue color is stable over a wide pH range. Partly sol in alcohol.
Derivative Type: 2,5-Disulfophenyl isomer
CAS Registry Number: 68238-36-8
Additional Names: Isosulfan blue
Trademarks: Lymphazurin (Pharmascience)
Use: Coloring medicinal products; in dyeing and printing wool, silk.
Therap-Cat: Isosulfan blue as diagnostic aid (lymphangiography). |