CAS 110-91-8: Morpholine (C4H9NO)
Identity
| CAS Number | 110-91-8 |
| Molecular Formula | C4H9NO |
| IUPAC Name | morpholine |
| Molecular Weight | 87.12 g/mol |
| SMILES | C1COCCN1 |
| Synonyms | morpholine, tetrahydro-1,4-oxazine, diethylene oximide, diethylene imidoxide |
2D Structure
Physical Properties
| Density | 1.007 g/mL at 25°C |
| Boiling Point | 129.0°C |
| Melting Point | -5.0°C |
| Flash Point | 38.0°C |
| Vapor Pressure | 1.0 kPa at 20°C |
| Refractive Index | nD = 1.455 |
| Dielectric Constant | ε = 7.4 |
Safety & GHS Classification
FlammableGHS05Irritant
- H226: Flammable liquid and vapor
- H302: Harmful if swallowed
- H312: Harmful in contact with skin
- H314: Causes severe skin burns and eye damage
- H332: Harmful if inhaled
Storage: Store in ventilated area away from heat and ignition sources. Hygroscopic — absorbs moisture from air. Keep container tightly sealed. Store away from strong oxidizers and acids. Use in well-ventilated area.
Material Compatibility Matrix
Plastics
| Material | Rating |
|---|---|
| PTFE | Excellent |
| PVC | Fair |
| PE | Good |
| PP | Good |
| PEEK | Excellent |
| PVDF | Good |
Rubbers
| Material | Rating |
|---|---|
| Viton | Good |
| NBR | Good |
| EPDM | Excellent |
| Silicone | Good |
| FKM | Good |
Metals
| Material | Rating |
|---|---|
| Stainless 316 | Excellent |
| Aluminum | Excellent |
| Copper | Fair |
| Brass | Fair |
Applications
- Corrosion inhibitor in boiler feed water
- Chemical intermediate for rubber accelerators
- Pharmaceutical intermediate (linezolid, etc.)
- Optical brightener manufacturing
- pH buffer in photographic processing
- Insecticide intermediate
- Paint and coating additive
External References: PubChem