can't read?
Tetrahydrofuran (THF) is an organic compound with the formula (CH2)4O. The compound is classified as heterocyclic compound, specifically a cyclic ether.
T 1417 (OTTO) Tetrahydrofuran, GR 99%+ cAS 109-99-9 - used as an aprotic solvent with moderate polarity in chemical reaction and solvent.