Indigo is a natural dye extracted from the leaves of certain plants and is the primary colorant used in blue dyeing and printing.
482-89-3
Indigotin;CI Natural Blue 1;CI 73000
C16H10N2O2
Irritant
Dyes and Colors , Textiles , Organic Intermediate
dark blue to purple powder
390
1.325
390 to 392
262.27
odorless