Morpholine is an organic chemical compound having the chemical formula O(CH2CH2)2NH. This heterocycle features both amine and ether functional groups. Because of the amine, morpholine is a base; its conjugate acid is called morpholinium. For example, treating morpholine with hydrochloric acid makes the salt morpholinium chloride.


Appearance & Physical State: aqueous solution with a fishlike odor
Density: 0.994
Melting Point: -5ºC
Freezing Point: -4.9℃
Boiling Point: 129ºC
Flash Point: 38ºC
Refractive Index: 1.453-1.455
Water Solubility: MISCIBLE
Stability: Stable. Flammable. Incompatible with strong oxidizing agents, strong acids, acid chlorides, acid anhydrides. Hygroscopic.
Storage Condition: Store at R.T.
Vapor Pressure: 31 mm Hg ( 38 °C)
Vapor Density: 3 (vs air)

Safety Info

RTECS: QD6475000
Hazard Class: 8
Safety Statements: S23-S36-S45
HS Code: 2934999090
Packing Group: I
WGK Germany: 3
RIDADR: UN 2054/1760
Risk Statements: R10; R20/21/22; R34
Hazard Codes: C