Q

Quinoline

IUPAC: quinoline

C9H7N Organic Compounds CAS 91-22-5
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Quick Reference
Formula / NotationC9H7N
CAS Number91-22-5
Molecular Weight129.16
Melting Point5 °F (NTP, 1992)
Boiling Point460 °F at 760 mmHg (NTP, 1992)
Density1.095 at 68 °F (USCG, 1999) - Denser than water; will sink
Solubilityless than 0.1 mg/mL at 72.5 °F (NTP, 1992)
AppearanceQuinoline appears as a colorless liquid with a peculiar odor. Slightly denser than water. Contact may irritate to skin, eyes, and mucous membranes. May be toxic by ingestion. Used to make other che...
Also Known As91-22-5; 1-Benzazine; Chinoline; Chinoleine; Chinolin; Quinolin; 1-Azanaphthalene; Leucol; Leukol; Benzopyridine
CategoryOrganic Compounds

What is Quinoline?

Quinoline and its strong acid salts can cause cancer according to an independent committee of scientific and health experts.

Formula & Notation

C9H7N

IUPAC Name: quinoline

Other Names / Synonyms: 91-22-5; 1-Benzazine; Chinoline; Chinoleine; Chinolin; Quinolin; 1-Azanaphthalene; Leucol; Leukol; Benzopyridine

Properties & Characteristics

Appearance: Quinoline appears as a colorless liquid with a peculiar odor. Slightly denser than water. Contact may irritate to skin, eyes, and mucous membranes. May be toxic by ingestion. Used to make other che.... Molecular formula: C9H7N. Molecular weight: 129.16 g/mol. Boiling point: 460 °F at 760 mmHg (NTP, 1992). Melting point: 5 °F (NTP, 1992). Density: 1.095 at 68 °F (USCG, 1999) - Denser than water; will sink. Solubility: less than 0.1 mg/mL at 72.5 °F (NTP, 1992). Vapor pressure: 1 mmHg at 139.5 °F ; 5 mmHg at 193.3 °F (NTP, 1992). LogP: 2.

Physical Data

PropertyValue
Melting Point5 °F (NTP, 1992)
Boiling Point460 °F at 760 mmHg (NTP, 1992)
Density1.095 at 68 °F (USCG, 1999) - Denser than water; will sink
Molecular Weight129.16
Solubilityless than 0.1 mg/mL at 72.5 °F (NTP, 1992)
AppearanceQuinoline appears as a colorless liquid with a peculiar odor. Slightly denser than water. Contact may irritate to skin, eyes, and mucous membranes. May be toxic by ingestion. Used to make other che...

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 Quinoline
Formula C9H7N
CAS Number 91-22-5
Molecular Weight 129.16
Category Organic Compounds
Index All "Q" terms
Synonyms 91-22-5; 1-Benzazine; Chinoline; Chinoleine; Chinolin; Quinolin; 1-Azanaphthalene; Leucol; Leukol; Benzopyridine

Frequently Asked Questions

Quinoline and its strong acid salts can cause cancer according to an independent committee of scientific and health experts.

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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.

AllChemicals.info — The Online Chemical Glossary | https://allchemicals.info/chemical/quinoline

For educational purposes only. Verify all information before use.