I

Indole

IUPAC: 1H-indole

C8H7N Organic Compounds CAS 120-72-9
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Quick Reference
Formula / NotationC8H7N
CAS Number120-72-9
Molecular Weight117.15
Melting Point52.5 °C
Boiling Point254 °C
Density1.22 g/cu cm at 25 °C
Solubility3560 mg/L (at 25 °C)
AppearanceWhite to yellowish solid with an unpleasant odor; Pleasant odor in dilute solutions; Turns red when exposed to light or air; [Hawley] White or yellow crystalline powder; [MSDSonline]
Also Known As1H-indole; 1H-Indole; 120-72-9; 2,3-Benzopyrrole; Indol; 1-Benzazole; Ketole; 1-Azaindene; Benzopyrrole; FEMA No. 2593
CategoryOrganic Compounds

What is Indole?

1H-indole is an indole and a polycyclic heteroarene. It has a role as an Escherichia coli metabolite. It is a tautomer of a 3H-indole.

Formula & Notation

C8H7N

IUPAC Name: 1H-indole

Other Names / Synonyms: 1H-indole; 1H-Indole; 120-72-9; 2,3-Benzopyrrole; Indol; 1-Benzazole; Ketole; 1-Azaindene; Benzopyrrole; FEMA No. 2593

Properties & Characteristics

Appearance: White to yellowish solid with an unpleasant odor; Pleasant odor in dilute solutions; Turns red when exposed to light or air; [Hawley] White or yellow crystalline powder; [MSDSonline]. Molecular formula: C8H7N. Molecular weight: 117.15 g/mol. Boiling point: 254 °C. Melting point: 52.5 °C. Density: 1.22 g/cu cm at 25 °C. Solubility: 3560 mg/L (at 25 °C). Vapor pressure: 0.01 [mmHg]. LogP: 2.1.

Physical Data

PropertyValue
Melting Point52.5 °C
Boiling Point254 °C
Density1.22 g/cu cm at 25 °C
Molecular Weight117.15
Solubility3560 mg/L (at 25 °C)
AppearanceWhite to yellowish solid with an unpleasant odor; Pleasant odor in dilute solutions; Turns red when exposed to light or air; [Hawley] White or yellow crystalline powder; [MSDSonline]

Uses & Applications

Used as an industrial feedstock, solvent, pharmaceutical intermediate, flavoring agent, or chemical building block.

Safety Information

Flammable or irritant. Many organic compounds are flammable liquids or vapours. Keep away from ignition sources. Consult SDS for specific hazard data.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term Indole
Formula C8H7N
CAS Number 120-72-9
Molecular Weight 117.15
Synonyms 1H-indole; 1H-Indole; 120-72-9; 2,3-Benzopyrrole; Indol; 1-Benzazole; Ketole; 1-Azaindene; Benzopyrrole; FEMA No. 2593

Frequently Asked Questions

1H-indole is an indole and a polycyclic heteroarene. It has a role as an Escherichia coli metabolite. It is a tautomer of a 3H-indole.

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Editorial standards: Chemical data is sourced from peer-reviewed literature, CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA, and IAEA. For educational purposes only — always consult official SDS documentation and qualified professionals before handling chemicals.