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Names | |||
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Preferred IUPAC name
Oxolane[1] | |||
Systematic IUPAC name
1,4-Epoxybutane 1-Oxacyclopentane | |||
Other names
Tetrahydrofuran
THF 1,4-Butylene oxide Cyclotetramethylene oxide fraction Furanidin Tetra-methylene oxide, Oxolane | |||
Identifiers | |||
3D model (JSmol)
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Abbreviations | THF | ||
ChEBI | |||
ChEMBL | |||
ChemSpider | |||
ECHA InfoCard | 100.003.389 | ||
PubChem CID
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RTECS number |
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UNII | |||
CompTox Dashboard (EPA)
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Properties | |||
C4H8O | |||
Molar mass | 72.107 g·mol−1 | ||
Appearance | Colorless liquid | ||
Odor | Ether-like[2] | ||
Density | 0.8876 g/cm3 at 20 °C, liquid [3] | ||
Melting point | −108.4 °C (−163.1 °F; 164.8 K) | ||
Boiling point | 66 °C (151 °F; 339 K)[4][3] | ||
Miscible | |||
Vapor pressure | 132 mmHg at 20 °C[2] | ||
Refractive index (nD)
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1.4073 at 20 °C[3] | ||
Viscosity | 0.48 cP at 25 °C | ||
Structure | |||
Envelope | |||
1.63 D (gas) | |||
Hazards | |||
GHS labelling: | |||
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Danger | |||
H225, H302, H319, H335, H351[5] | |||
P210, P280, P301+P312+P330, P305+P351+P338, P370+P378, P403+P235[5] | |||
NFPA 704 (fire diamond) | |||
Flash point | −14 °C (7 °F; 259 K) | ||
Explosive limits | 2–11.8%[2] | ||
Lethal dose or concentration (LD, LC): | |||
LD50 (median dose)
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LC50 (median concentration)
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21000 ppm (rat, 3 h)[6] | ||
NIOSH (US health exposure limits): | |||
PEL (Permissible)
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TWA 200 ppm (590 mg/m3)[2] | ||
REL (Recommended)
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TWA 200 ppm (590 mg/m3) ST 250 ppm (735 mg/m3)[2] | ||
IDLH (Immediate danger)
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2000 ppm[2] | ||
Related compounds | |||
Related heterocycles
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Furan Pyrrolidine Dioxane | ||
Related compounds
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Diethyl ether | ||
Supplementary data page | |||
Tetrahydrofuran (data page) | |||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Tetrahydrofuran (THF), or oxolane, is an organic compound with the formula (CH2)4O. The compound is classified as heterocyclic compound, specifically a cyclic ether. It is a colorless, water-miscible organic liquid with low viscosity. It is mainly used as a precursor to polymers.[8] Being polar and having a wide liquid range, THF is a versatile solvent. It is an isomer of another solvent, butanone.
Ullmann
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