Pharmaceutical Materials

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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