Find the anhydrous tetrahydrofuran chemical properties, the physical and chemical properties of tetr

Molecular weight relative density (204).

Freezing point Boiling point

Flash point (closed).

Refractive index (20).

Dielectric constant (25).

Dipole moment (10 -30c·m) and surface tension (mn m).

Viscosity (20 ) mpa·s

Critical temperature

Critical pressure mpa

Vapor pressure (15) kPa

Relative vapor density (air = 1).

Ignition point heat of evaporation (66) (kj kg) 410

**Limit % (volume).

Minimum ignition energy mj

Specific heat capacity: Liquid: Gas:

Heat of evaporation: 410kJ kg colorless transparent liquid, similar to ether-like odor, soluble in ethanol, ether, aliphatic hydrocarbons, aromatic hydrocarbons, chlorinated hydrocarbons, acetone, benzene and other organic solvents, but the water solubility is low, toxic, the maximum allowable concentration in the air is 200ppm, mice inhale the number of meters at a time to death, the concentration of 65 mg cubic meters.

Tetrahydrofuran has the characteristics of toxicity, low boiling point, good fluidity, etc., is an important organic synthesis and fine chemical raw materials and excellent solvents, tetrahydrofuran has a wide range of uses, tetrahydrofuran has good solubility to many organic substances, it can dissolve all organic compounds except polyethylene, polypropylene and fluorine resin, especially for polyvinyl chloride, polyvinylidene chloride, and odieaniline has a good solubility, is widely used as a reactive solvent, has the "universal solvent" said. As a commonly used solvent, THC has been widely used in the surface treatment of surface coatings, protective coatings, inks, extractants and artificial leather, and is also the main solvent in the pharmaceutical industry. Widely used in resin solvents (tape coating, PVC surface coating, cleaning PVC reactor, removing PVC film, cellophane coating, plastic printing ink, thermoplastic polyurethane coating); reaction solvents (format reagents, alkyl and aryl base metal compounds, aluminum and boron hydride, steroids and macromolecular organic polymers); Chromatographic solvent (gel permeation chromatography).

Tetrahydrofuran is also an important raw material for the production of polytetramethylene ether glycol (PTMEG) and is used for natural gas flavoring.

Commonly abbreviated as THF in organic synthesis, it is a common organic solvent with stable chemical properties. Anhydrous THF is usually used in the reaction with the participation of format reagents, strong bases (such as sodium aloxide), such as the preparation of format reagents, the addition reaction between format reagents and carbonyl groups, dicarbonyl carboanion reactions and other synthesis reactions.

A common solvent in synthesis that acts similarly to it is ether.

Tetrahydrofuran is a colorless, water-miscible organic liquid with a small viscosity at room temperature and pressure, and is a medium-polar aprotic solvent commonly used in potatoes because of its long liquid range. Its main use is as a precursor to polymers.

Value: 5; 2.Melting Point: minus Celsius parsley;

3.Boiling Point: 66 degrees Celsius;

4.Relative density: The density of water is 1, and its density is;

5.Relative vapor density: the density of air is 1, and its density is;

6.Saturation vapor pressure: kPa at 20 degrees Celsius;

7.Heat of combustion: minus kilojoules per mole;

8.Critical temperature: 268 degrees Celsius.

Tetrahydrofuran, also known as oxacyclopentane, 1,4-butyloxide, is a heterocyclic organic compound, the chemical formula is C4H8O, belongs to the ether class, is a complete hydrogenation product of furan, is a colorless transparent liquid, soluble in water, ethanol, ether, acetone, benzene, etc., mainly used as a solvent, chemical synthesis intermediate, analytical reagent.

On October 27, 2017, the list of carcinogens released by the World Health Organization's International Agency for Research on Cancer (IARC) was preliminarily sorted out for reference, and tetrahydrofuran was included in the list of carcinogens in category 2b.

Physicochemical Properties: Density:; Melting point:; Boiling Point: 66

It is mainly used as a solvent, a reagent for the analysis of leakage in chemical synthesis.

According to the Fundamentals of Organic Chemistry, the soluble substance refers to a substance that can be dissolved in tetrahydrofuran (THF).

Among them, THF is a colorless, volatile organic closed wax solvent. Tetrahydrofuran soluble is often used to describe the solubility of certain polymer compounds in THF, because THF is one of the important solvents for many old polymer materials.

Some polymer compounds, such as polycarbonate and polymethyl linolenicate, have high THC solubility. These materials are widely used in solution-based polymer electrolytes, drug delivery permeation systems, polymer composites, and other fields. Therefore, tetrahydrofuran solubles are an important concept in polymer chemistry and materials science.

At night, the molecular formula of THF is C4H8O, and it can also be written as (CH2)4O with oxygen end outside according to the structure of the five groups of blind cyclic ethers.