Tetrahydropyran CAS Number: 142-68-7
Pharmaceutical Materials 2025-03-02
CAS Number: 142-68-7
Molecular Formula: C5H10O
Molecular Weight: 86.13
Appearance: Colorless to light yellow liquid
Melting Point: -44.2 to -49°C
Boiling Point: 88°C
Density: 0.881-0.888 g/mL
Usage: Used as a solvent in paints, rubber, and chemical syntheses.
Tetrahydropyran, also known as oxane or pentamethylene oxide, is a chemical compound with the CAS number 142-68-7. It is a six-membered saturated heterocyclic compound containing an oxygen atom. Tetrahydropyran is a colorless to pale yellow liquid with a special ether-like odor. It is miscible with water, ethanol, ether, and other organic solvents. This compound is widely used as a solvent in nitrocellulose lacquers, rubber, and Grignard reactions. Additionally, it serves as an intermediate in the production of pharmaceuticals.
| Property | Value |
|---|---|
| CAS Number | 142-68-7 |
| Appearance | Colorless to pale yellow liquid |
| Odor | Special ether-like |
| Melting Point | -45 °C (lit.) |
| Boiling Point | 88 °C (lit.) |
| Density | 0.881 g/mL at 25 °C (lit.) |
| Vapor Density | 3 (vs air) |
| Refractive Index | n20/D 1.42 (lit.) |
| Flash Point | -15.6 °C or 4 °F |
| Solubility | >80 g/L in water (25 °C) |
| Chemical Stability | Forms explosive peroxides upon exposure to air or light |
| Reactivity | Reacts vigorously with acids |
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