Name:Indigo carmine
Synonyms:2-(1,3-Dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro-3H-indol-3-one; 2,2'-Bis(2,3-dihydro-3-oxoindolylidene); Indigo blue; C.I. 73000; Vat Blue 1
Molecular Formula:C16H10N2O2
Molecular Weight:262.27
CAS Registry Number:482-89-3
EINECS:207-586-9
Indigo dye is an organic compound with a distinctive blue color (see indigo). Historically, indigo was extracted from plants, and this process was important economically because blue dyes were once rare. Nearly all indigo produced today - several thousand tons each year - is synthetic. It is the blue of blue jeans.
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