Description

Acenaphthene (CAS 83-32-9) is a polycyclic aromatic hydrocarbon (PAH) with the molecular formula C₁₂H₁₀. This white crystalline solid is derived from coal tar and is widely used as a precursor in organic synthesis and industrial applications. Its IUPAC name, 1,2-dihydroacenaphthylene, reflects its fused ring structure, which consists of a naphthalene core with an ethylene bridge. Acenaphthene exhibits high thermal stability and is soluble in organic solvents such as benzene, toluene, and dichloromethane, while being insoluble in water. It is available in high-purity grades (≥98%) for research, analytical standards, and material science applications. Suitable for UV/Vis spectroscopy, fluorescence studies, and as a building block for advanced materials.

Properties

• CAS Number: 83-32-9
• Complexity: 155
• IUPAC Name: 1,2-dihydroacenaphthylene
• InChI: InChI=1S/C12H10/c1-3-9-4-2-6-11-8-7-10(5-1)12(9)11/h1-6H,7-8H2
• InChI Key: CWRYPZZKDGJXCA-UHFFFAOYSA-N
• LogP: log Kow = 3.92
• Exact Mass: 154.078250319
• Molecular Formula: C12H10
• Molecular Weight: 154.21
• SMILES: C1CC2=CC=CC3=C2C1=CC=C3
• Monoisotopic Mass: 154.078250319
• Physical Description: 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 acrid smoke and irritating fumes when heated to decomposition. Derived from coal tar and used to make dyes, pharmaceuticals, insecticides, fungicides, and plastics.
• Color/Form: White needles
• Boiling Point: 534 °F at 760 mmHg
• Melting Point: 203 °F
• Flash Point: 125.0 °C – closed cup
• Solubility: less than 1 mg/mL at 68 °F
• Density: 1.024 at 210 °F – Denser than water; will sink
• Vapor Density: 5.32 – Heavier than air; will sink
• Vapor Pressure: 0.001 to 0.01 mmHg at 68 °F ; 5 mmHg at 238.6 °F
• Henry’s Law Constant: Henry’s Law constant = 1.84X10-4 atm-cu m/mol at 25 °C
• Stability/Shelf Life: Stable under recommended storage conditions.
• Autoignition Temperature: >450 °C
• Heat of Combustion: -4.033X10+7 J/kg
• Heat of Vaporization: 3.48X10+5 J/kg at 40 °C
• Odor Threshold: Odor detection in air, 8.0X10-2 ppm
• Refractive Index: Index of refraction: 1.6048 at 95 °C
• Synonyms: ACENAPHTHENE, 83-32-9, 1,2-Dihydroacenaphthylene, 1,8-Ethylenenaphthalene, peri-Ethylenenaphthalene, Naphthyleneethylene, Acenaphthylene, 1,2-dihydro-, Ethylenenaphthalene, 1,8-Dihydroacenaphthalene, acenapthene, CCRIS 5951, HSDB 2659, UNII-V8UT1GAC5Y, V8UT1GAC5Y, NSC 7657, EINECS 201-469-6, DTXSID3021774, CHEBI:22154, AI3-00128, NSC-7657, ACENAPHTHENE [MI], ACENAPHTHENE [HSDB], ACENAPHTHENE [IARC], DTXCID201774, EC 201-469-6, ACENAPHTHENE (IARC), Acenaphtene, Acenafeno, Acenaphthene solution, Acenafeno (Spanish), 1,8Ethylenenaphthalene, 1,2Dihydroacenaphthylene, 1,8Dihydroacenaphthalene, 1, 2-Dihydroacenaphthylene, PERIETHYLENENAPHTHALENE, 1,8-DIHYDROACENAPHTHYLENE, AI300128, 201-469-6, cwrypzzkdgjxca-uhfffaoysa-n, inchi=1/c12h10/c1-3-9-4-2-6-11-8-7-10(5-1)12(9)11/h1-6h,7-8h, MFCD00003807, CAS-83-32-9, Acenaphthene (1,2-Dihydro Acenaphthylene), Acenaphthene; 1,2-Dihydroacenaphthylene; peri-Ethylenenaphthalene; 1,8-Ethylenenaphthalene, Acenaphthene, 97%, Acenaphthene, 99%, ACENAPHTHENE,, SCHEMBL9017, SCHEMBL37944, SCHEMBL44464, Naphthalene, 1,8-ethylene-, BIDD:GT0787, SCHEMBL127118, SCHEMBL132772, SCHEMBL141824, SCHEMBL3099744, SCHEMBL4396833, CHEMBL1797271, SCHEMBL11831881, SCHEMBL28470875, Acenaphthene, analytical standard, NSC7657, Tox21_202400, Tox21_300013, SBB060402, STL483068, AKOS000119983, FA06996, FS-4341, NCGC00163966-01, NCGC00163966-02, NCGC00163966-03, NCGC00163966-04, NCGC00254079-01, NCGC00259949-01, AC-19767, Acenaphthene 10 microg/mL in Acetonitrile, Acenaphthene 100 microg/mL in Acetonitrile, DB-056708, A0003, A0135, NS00006748, ST50186536, EN300-17412, C19312, D97698, Acenaphthene Zone Refined (number of passes:30), Q415103, 07C – Polycyclic Aromatic Hydrocarbons (2 Spikes), 19C – Polycyclic Aromatic Hydrocarbons (2 Spikes), Z56926550, 73BCD470-1E93-4E76-BF03-E06FB8FE00EA, Acenaphthene, certified reference material, TraceCERT(R), F1908-0103

Application

Acenaphthene is primarily used as an intermediate in the synthesis of dyes, plastics, and pharmaceuticals. It serves as a model compound in environmental studies due to its presence as a pollutant in soil and water. Researchers also utilize it in photochemistry experiments and as a standard for calibrating analytical instruments like HPLC and GC-MS.

Safety and Hazards

GHS Hazard Statements

• H315: Causes skin irritation [Warning Skin corrosion/irritation]
• H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation]
• H335: May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
• H350: May cause cancer [Danger Carcinogenicity]
• H400: Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]
• H410: Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard]

Precautionary Statements

• P203, P261, P264, P264+P265, P271, P273, P280, P302+P352, P304+P340, P305+P351+P338, P318, P319, P321, P332+P317, P337+P317, P362+P364, P391, P403+P233, P405, and P501

Hazard Classes and Categories

• Eye Irrit. 2A (83.5%)
• Aquatic Acute 1 (89.8%)
• Aquatic Chronic 1 (90.6%)

If you are interested or have any questions, please contact us at support@atomfair.com

Disclaimer: Sold exclusively for laboratory research. Prohibited for commercial use, diagnostics, or human/animal applications. Buyers assume all compliance liability.