Tetrahydrofuran

CAS Number
109-99-9
EC Number
203-726-8
Chemical Formula
C4H8O
Molecular Weight
72.11 g/mol
Abbreviation
THF

Description

Tetrahydrofuran (CAS 109-99-9), commonly known as THF or oxolane, is a cyclic ether solvent with exceptional miscibility across both polar and non-polar systems. It dissolves a broad range of polymers, resins, and active compounds. This versatile solvent handles materials that resist other common liquids, making it a go-to choice for demanding formulation and synthesis work. In pharmaceutical manufacturing, it is used as a reaction solvent and extraction medium.

Its ability to solvate organolithium and Grignard reagents is critical to process chemistry during API synthesis. PVC adhesives and coatings rely on this chemical as the primary solvent, enabling strong substrate bonding in pipe fittings. It is also utilized in footwear and industrial laminates. It functions as a polymerization solvent in the production of polytetramethylene ether glycol (PTMEG), a key intermediate for spandex fibers and polyurethane elastomers.

In analytical and QC laboratories, it serves as a standard HPLC mobile phase component for separating polymers and pharmaceutical compounds. The product is supplied as a clear liquid in drums, IBCs, and bulk tanker quantities. Anhydrous and stabilized grades are the most common commercial forms, with stabilizer-free variants available for sensitive synthesis applications. Technical and reagent-grade specifications are standard for industrial use.

HPLC-grade is available for laboratory and analytical procurement. Our material meets rigorous industry requirements to ensure consistent performance across all manufacturing and research applications.

Other Names (Synonyms)

tetramethylene oxide|Oxolane|diethylene oxide|Cyclotetramethylene oxide|butylene oxide|butane alpha,delta-oxide|Butane a,D-oxide|1,4-epoxybutane|THF

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

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Physical Properties

Melting Point -108.3 °C
Boiling Point 65 °C @ Press: 760 Torr
Density 0.8892 g/cm³ @ Temp: 20 °C
Flash Point >230 °F
Appearance Tetrahydrofuran is a colorless liquid. Ethereal odor. The Odor Threshold is listed @ 3.8 (3M), 20-50 ppm, and 31 ppm.
Color <10(APHA)
Odor Ethereal, detectable at 2 to 50 ppm
Form Liquid
Water Solubility miscible
Vapor Pressure <0.01 mm Hg ( 25 °C)
Refractive Index n 20/D 1.465
pH 7-8 (200g/l, H2O, 20℃)
Log P 0.45 at 25℃

Documentation

Safety & Handling Learn More

Danger
GHS02· Flammable GHS07· Irritant GHS08· Health Hazard

Hazard Statements

H225 Highly Flammable liquid and vapor
H302 Harmful if swallowed
H315 Causes skin irritation
H319 Causes serious eye irritation

Precautionary Statements

P203 Obtain, consult and follow expert instructions for use.
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233 Keep container tightly closed.
P240 Ground and bond container and receiving equipment.

Trade & Regulatory

HS Code 29321100
UN Number 2924
ADR Class 3
Packing Group II
Storage Class 3 - Flammable liquids
WGK (Germany) 1
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