186562

Tetrahydrofuran

≥99.9%, anhydrous, contains 250 ppm BHT as inhibitor

• Synonyma: THF, Butylene oxide, Oxolane, Tetramethylene oxide
• Empirický vzorec (Hillův zápis): C₄H₈O
• Číslo CAS: 109-99-9
• Molekulová hmotnost: 72.11
• Beilstein/REAXYS Number: 102391
• EC Number: 203-726-8
• MDL number: MFCD00005356
• UNSPSC Code: 12191501
• PubChem Substance ID: 57647757
• NACRES: NA.21

Vlastnosti

• product name: Tetrahydrofuran, anhydrous, contains 250 ppm BHT as inhibitor, ≥99.9%
• grade: anhydrous
• Quality Level: 200
• vapor density: 2.5 (vs air)
• vapor pressure: 114 mmHg ( 15 °C); 143 mmHg ( 20 °C)
• assay: ≥99.9%
• form: liquid
• autoignition temp.: 610 °F
• contains: 250 ppm BHT as inhibitor
• expl. lim.: 1.8-11.8 %
• impurities: ≤0.005% peroxides (as H₂O₂); <0.002% water (All units except 100 mL); <0.005% water (100 mL pkg)
• refractive index: n20/D 1.407 (lit.)
• pH: ~7
• bp: 65-67 °C (lit.)
• mp: −108 °C (lit.)
• solubility: H₂O: soluble
• density: 0.889 g/mL at 25 °C (lit.)
• SMILES string: C1CCOC1
• InChI: 1S/C4H8O/c1-2-4-5-3-1/h1-4H2
• InChI key: WYURNTSHIVDZCO-UHFFFAOYSA-N

Popis

General description

Tetrahydrofuran (THF) is a saturated cyclic ether mainly used as an organic solvent. On long term storage it forms organic peroxides. This process can be suppressed by adding butylated hydroxytoluene (BHT) as a stabilizer. BHT removes the free radicals required for the peroxide formation. It constitutes the key fragment of various natural products (polyether antibiotics). THF forms double hydrate with hydrogen sulfide, crystal structure of this double hydrate has been investigated by three-dimensional single-crystal studies.

Application

Dry tetrahydrofuran (THF) has been used in the synthesis of dichloro{bis[1,1′,1′′-(phosphinetriyl)tripiperidine]}palladium [(P(NC₅H₁₀)₃)₂Pd(Cl)₂], which is widely used in the Heck reaction as a catalyst. It has been employed in the reaction medium of the Heck cross-coupling reaction of various aryl bromides and olefins.

Packaging

View returnable container options.

Other Notes

Greener alternatives are available for many THF applications, 2-Methyltetrahydrofuran (414247) and Cyclopentyl methyl ether (675970)

Bezpečnostní informace

• pictograms: GHS02,GHS08,GHS07
• signalword: Danger
• hcodes: H225,H302,H319,H335,H336,H351
• pcodes: P202 - P210 - P233 - P301 + P312 - P305 + P351 + P338 - P308 + P313
• Hazard Classifications: Acute Tox. 4 Oral - Carc. 2 - Eye Irrit. 2 - Flam. Liq. 2 - STOT SE 3
• target_organs: Central nervous system, Respiratory system
• supp_hazards: EUH019
• Storage Class: 3 - Flammable liquids
• wgk_germany: WGK 1
• flash_point_f: -6.2 °F - closed cup
• flash_point_c: -21.2 °C - closed cup
• ppe: Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter