Indole

Indole

Names
Preferred IUPAC name 1H-Indole[1]
Other names 2,3-Benzopyrrole, ketole, 1-benzazole
Identifiers
CAS Number	120-72-9 Y
3D model (JSmol)	Interactive image
3DMet	B01251
Beilstein Reference	107693
ChEBI	CHEBI:16881 Y
ChEMBL	ChEMBL15844 Y
ChemSpider	776 Y
DrugBank	DB04532
ECHA InfoCard	100.004.019
EC Number	204-420-7
Gmelin Reference	3477
KEGG	C00463 Y
PubChem CID	798
RTECS number	NL2450000
UNII	8724FJW4M5 Y
CompTox Dashboard (EPA)	DTXSID0020737
SMILES C12=C(C=CN2)C=CC=C1
Properties
Chemical formula	C8H7N
Molar mass	117.15 g·mol−1
Appearance	White solid
Odor	Feces or jasmine like
Density	1.1747 g/cm3, solid
Melting point	52 to 54 °C (126 to 129 °F; 325 to 327 K)
Boiling point	253 to 254 °C (487 to 489 °F; 526 to 527 K)
Solubility in water	0.19 g/100 ml (20 °C) Soluble in hot water
Acidity (pKa)	16.2 (21.0 in DMSO)
Basicity (pKb)	17.6
Magnetic susceptibility (χ)	-85.0·10−6 cm3/mol
Structure
Crystal structure	Pna21
Molecular shape	Planar
Dipole moment	2.11 D in benzene
Hazards
Main hazards	Skin sensitising
Related compounds
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Indole (a blending of the terms indigo and oleum) is an organic compound. The chemical can be found in many places in nature. It can be produced by bacteria. At room temperature, indole is a solid.

Indole is found in some vegetables. They include broccoli, cauliflower and cabbage.^[2] It is also in human feces. It has a strong fecal odor. In low concentration indole has a flowery smell. Indole is in perfumes.^[3]

1. ↑ International Union of Pure and Applied Chemistry (2014). Nomenclature of Organic Chemistry: IUPAC Recommendations and Preferred Names 2013. The Royal Society of Chemistry. p. 213. doi:10.1039/9781849733069. ISBN 978-0-85404-182-4.
2. ↑ "Indole as Defined". The National Cancer Institutes. Retrieved December 26, 2021.
3. ↑ "Olefactory Perception with Humans". The National Centers for Biotechnology Information. Retrieved December 26, 2021.