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Sigma-Aldrich

Indigo

synthetic, Dye content 95 %

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Synonym(s):
Indigo blue, Indigotin
Empirical Formula (Hill Notation):
C16H10N2O2
CAS Number:
482-89-3
Molecular Weight:
262.26
Colour Index Number:
73000
Beilstein:
88275
EC Number:
207-586-9
MDL number:
MFCD00005722
UNSPSC Code:
12171500
PubChem Substance ID:
24853742
NACRES:
NA.47

Quality Level

200

form

powder

composition

Dye content, 95%

technique(s)

titration: suitable

mp

>300 °C (lit.)

density

1.35 g/cm3 at 20 °C

λmax

602 nm

ε (extinction coefficient)

≥8000 at 599-605 nm in chloroform

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

O=C1C(\Nc2ccccc12)=C3/Nc4ccccc4C3=O

InChI

1S/C16H10N2O2/c19-15-9-5-1-3-7-11(9)17-13(15)14-16(20)10-6-2-4-8-12(10)18-14/h1-8,17-18H/b14-13+

InChI key

COHYTHOBJLSHDF-BUHFOSPRSA-N

Gene Information

human ... EPHX2(2053)
mouse ... Ephx2(13850)

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Application

Indigo has been used as a dye to measure food consumption in Drosophila. It has also been used to investigate the ability of fungal strains in the degradation and decolorization of indigo dye.

Biochem/physiol Actions

Indigo is a rich blue color dye. It can be extracted from plants of genus Indigofera and can also be produced synthetically. Indigo is a vat textile dye, widely used on cellulosic fibers like cotton. Additionally, it is also used to inhibit corrosion of mild steel in aerated sulfuric acid.

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H315,H319,H335

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Decolorization of textile indigo dye by ligninolytic fungi
Balan DSL and Monteiro RTR
Journal of Biotechnology, 89(2-3), 141-145 (2001)
Inhibition of mild steel corrosion in sulphuric acid using indigo dye and synergistic halide additives
Oguzie EE, et al.
Materials Chemistry and Physics, 84, 363-368 (2004)
Insulin-producing cells in the Drosophila brain also express satiety-inducing cholecystokinin-like peptide, drosulfakinin
Soderberg JAE, et al.
Frontiers in Endocrinology, 3, 109-109 (2012)
Indigo: Cultivate, dye, create (2018)
Optimization of fungal decolorization of azo and anthraquinone dyes via Box-Behnken design
Papadopoulou K , et al.
International Biodeterioration & Biodegradation, 77, 31-38 (2013)
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