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Acenaphthene

IUPAC: 1,2-dihydroacenaphthylene

C12H10 Organic Compounds CAS 83-32-9
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Quick Reference
Formula / NotationC12H10
CAS Number83-32-9
Molecular Weight154.21
Melting Point203 °F (NTP, 1992)
Boiling Point534 °F at 760 mmHg (NTP, 1992)
Density1.024 at 210 °F (NTP, 1992) - Denser than water; will sink
Solubilityless than 1 mg/mL at 68 °F (NTP, 1992)
AppearanceAcenaphthene appears as white needles. Melting point 93.6 °C. Soluble in hot alcohol. Denser than water and insoluble in water. Hence sinks in water. May irritate skin and mucous membranes. Emits ...
Also Known As1,2-dihydroacenaphthylene; 83-32-9; 1,2-Dihydroacenaphthylene; 1,8-Ethylenenaphthalene; peri-Ethylenenaphthalene; Naphthyleneethylene; Acenaphthylene, 1,2-dihydro-; Ethylenenaphthalene; 1,8-Dihydroacenaphthalene; DTXSID3021774
CategoryOrganic Compounds

What is Acenaphthene?

Acenaphthene is a polycyclic aromatic hydrocarbon derived from naphthalene by the addition of an ethylene bridge connecting C-1 and C-8.

Formula & Notation

C12H10

IUPAC Name: 1,2-dihydroacenaphthylene

Other Names / Synonyms: 1,2-dihydroacenaphthylene; 83-32-9; 1,2-Dihydroacenaphthylene; 1,8-Ethylenenaphthalene; peri-Ethylenenaphthalene; Naphthyleneethylene; Acenaphthylene, 1,2-dihydro-; Ethylenenaphthalene; 1,8-Dihydroacenaphthalene; DTXSID3021774

Properties & Characteristics

Appearance: Acenaphthene appears as white needles. Melting point 93.6 °C. Soluble in hot alcohol. Denser than water and insoluble in water. Hence sinks in water. May irritate skin and mucous membranes. Emits .... Molecular formula: C12H10. Molecular weight: 154.21 g/mol. Boiling point: 534 °F at 760 mmHg (NTP, 1992). Melting point: 203 °F (NTP, 1992). Density: 1.024 at 210 °F (NTP, 1992) - Denser than water; will sink. Solubility: less than 1 mg/mL at 68 °F (NTP, 1992). Vapor pressure: 0.001 to 0.01 mmHg at 68 °F ; 5 mmHg at 238.6 °F (NTP, 1992). LogP: 3.9.

Physical Data

PropertyValue
Melting Point203 °F (NTP, 1992)
Boiling Point534 °F at 760 mmHg (NTP, 1992)
Density1.024 at 210 °F (NTP, 1992) - Denser than water; will sink
Molecular Weight154.21
Solubilityless than 1 mg/mL at 68 °F (NTP, 1992)
AppearanceAcenaphthene appears as white needles. Melting point 93.6 °C. Soluble in hot alcohol. Denser than water and insoluble in water. Hence sinks in water. May irritate skin and mucous membranes. Emits ...

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 Acenaphthene
Formula C12H10
CAS Number 83-32-9
Molecular Weight 154.21
Synonyms 1,2-dihydroacenaphthylene; 83-32-9; 1,2-Dihydroacenaphthylene; 1,8-Ethylenenaphthalene; peri-Ethylenenaphthalene; Naphthyleneethylene; Acenaphthylene, 1,2-dihydro-; Ethylenenaphthalene; 1,8-Dihydroacenaphthalene; DTXSID3021774

Frequently Asked Questions

Acenaphthene is a polycyclic aromatic hydrocarbon derived from naphthalene by the addition of an ethylene bridge connecting C-1 and C-8.

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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.