What is tetrahydrofuran used for?
Tetrahydrofuran (THF) is commonly used as solvent, reaction medium, and starting material for various syntheses in the chemical industry, for example, for preparing adhesives, special paints, coatings, fibers, in the extraction of specific active substances, for recrystallization of certain compounds or as starting …
How much BHT is THF?
Tetrahydrofuran contains 250 ppm BHT as inhibitor, puriss.
What is the structure of THF?
C4H8O
Tetrahydrofuran/Formula
What is inhibitor free THF?
Description. Tetrahydrofuran is a clear colorless liquid with an ethereal odor. It is used as a polar aprotic solvent and in gel permeation chromatography. THF tends to form shock sensitive peroxides on storage in air so it often sold inhibited with BHT but is available uninhibited also.
Why is it called tetrahydrofuran?
That’s right, it means four, for the four hydrogen atoms that have been added! Another important structural aspect of THF is that it’s a polar molecule.
How do you stabilize tetrahydrofuran?
It is highly flammable. To minimize this problem, commercial supplies of THF are often stabilized with butylated hydroxytoluene (BHT). Distillation of THF to dryness is unsafe because the explosive peroxides can concentrate in the residue.
Is THF anhydrous?
≥99.0%, 500ML.
Why is tetrahydrofuran polar?
Another important structural aspect of THF is that it’s a polar molecule. Since oxygen is more electronegative than carbon and hydrogen, the oxygen pulls electron density towards itself in the form of the covalent bonds within the ring structure.
Why is tetrahydrofuran used as a solvent?
THF is widely used as a solvent for special resins such as photosensitive resins, because even at room temperature it can dissolve various resins, and it is miscible with water and most organic solvents.
Is THF flammable?
FIRE HAZARDS * Tetrahydrofuran is a FLAMMABLE LIQUID. * Use dry chemical, CO2, alcohol or polymer foam extinguishers, as water may not be effective in fighting fires.
How long should you keep peroxide forming chemicals?
Storage and Shelf Life
| Peroxidizable Chemical Classification | Dispose (or Test) After |
|---|---|
| Unopened chemicals from the manufacturer | 18 months |
| Class A | 3 months |
| Class B | 12 months |
| Class C (Uninhibited) | 24 hours |