Tetrahydrofuran (THF), CAS 109-99-9, is also known as oxolane or tetramethylene oxide. It is a cyclic ether solvent used in polymer and chemical processing. Request the current inhibitor status, water content, assay, packaging and COA/SDS for the offered product.
Tetrahydrofuran (THF) CAS 109-99-9
- CAS: 109-99-9
- Synonyms: Tetrahydrofuran; THF; Oxolane; Tetramethylene oxide
- Einecs: 203-726-8
- Molecular Formula: C₄H₈O
- Grade: Confirm current product specification
- Package: Confirm packaging for the offered form
Product Description
Tetrahydrofuran (THF)
Aliases: tetrahydrofuran; THF; oxolane; tetramethylene oxide; 1,4-epoxybutane
CAS: 109-99-9
Molecular Weight: 72.11 g/mol
Molecular Formula: C₄H₈O
Properties: Colorless transparent liquid, with ether odor.
Freezing point: -108°C
Density: approximately 0.889 g/mL at 20 °C
Refractive index: 1.4070
Solubility: miscible with water, alcohols, ketones, benzene, esters, hydrocarbons.
Boiling point: 66 °C
Typical evaluation areas: polymer processing and organic chemical reactions. Confirm solvent grade, inhibitor status, water and compatibility with the intended process.
Follow the current SDS for the offered form.
For a related cyclic ether solvent raw material, see 1,4-Dioxane.
Packaging: confirm packaging for the offered form.
Assay: confirm against the current supplier specification.
FAQ - Technical & Supply Chain
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Q:
Are stabilized and unstabilized Tetrahydrofuran interchangeable?
A: No. Stabilized THF contains an inhibitor selected to limit peroxide formation, while inhibitor-free or low-inhibitor grades serve different processes and require tighter storage controls. Specify inhibitor identity and range, intended use and maximum peroxide level. Do not remove or change the stabilizer basis without a documented process review. -
Q:
Which release tests should be agreed for industrial THF?
A: Agree GC purity, water, peroxide, inhibitor content, acidity, color and residue after evaporation, plus UV absorbance or trace impurities when the application requires them. State whether results apply at manufacture or at delivery, because storage and air exposure can change peroxide and water levels. Review the lot COA and test dates. -
Q:
What should be confirmed for bulk Tetrahydrofuran delivery?
A: Confirm tanker, isotank, drum or IBC format, inhibitor basis, nitrogen condition, compatible seals, loading date and permitted storage period. The receiving site should have peroxide monitoring, bonding and grounding, closed transfer and flammable-liquid controls in place. Approve the current SDS, transport classification and unloading connection before dispatch.
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