Morpholine , ACS,≥99.0% , 110-91-8
Synonym(s):
Morpholine;Tetrahydro-1,4-oxazine
CAS NO.：110-91-8
Empirical Formula: C4H9NO
Molecular Weight: 87.12
MDL number: MFCD00005972
EINECS: 203-815-1
PRODUCT Properties
| Melting point: | -7--5 °C (lit.) |
| Boiling point: | 126.0-130.0 °C
129 °C (lit.) |
| Density | 0.996 g/mL at 25 °C (lit.) |
| vapor density | 3 (vs air) |
| vapor pressure | 31 mm Hg ( 38 °C) |
| refractive index | n |
| Flash point: | 96 °F |
| storage temp. | Store below +30°C. |
| solubility | water: miscible |
| pka | 8.33(at 25℃) |
| form | Liquid |
| Specific Gravity | 0.996 |
| color | APHA: ≤15 |
| PH | 11.2 (H2O)(undiluted) |
| Odor | Characteristic amine-like odor |
| explosive limit | 1.4-15.2%(V) |
| Water Solubility | MISCIBLE |
| FreezingPoint | -4.9℃ |
| Sensitive | Hygroscopic |
| Merck | 14,6277 |
| BRN | 102549 |
| Exposure limits | TLV-TWA 20 ppm (～70 mg/m3) (ACGIH,
MSHA, and OSHA); STEL skin 30 ppm
(ACGIH); IDLH 8000 ppm. |
| Dielectric constant | 7.3（25℃） |
| Stability: | Stable. Flammable. Incompatible with strong oxidizing agents, strong acids, acid chlorides, acid anhydrides. Hygroscopic. |
| InChIKey | YNAVUWVOSKDBBP-UHFFFAOYSA-N |
| LogP | -0.860 |
Description and Uses
Morpholine is a colorless liquid with a weakammonia or fish-like odor. The odor threshold is 0.01 ppm.Molecular weight = 87.14; Specific gravity (H2O:1) 51.007; Boiling point = 128.9℃; Freezing/Meltingpoint 5 25℃; Vapor pressure 5 6 mmHg at 20℃; Flashpoint 5 37℃. Autoignition temperature 5 310℃. Explosivelimits: LEL 5 1.4%; UEL 5 11.2%. Hazard Identification(based on NFPA-704 M Rating System): Health 3,Flammability 3, Reactivity 0. Soluble in water
Rubber accelerator, solvent, additive to boilerwater, waxes and polishes, optical brightener fordetergents, corrosion inhibitor, preservation of bookpaper, organic intermediate (catalyst, antioxidants,pharmaceuticals, bactericides, etc.).
Safety
| Symbol(GHS) |    GHS02,GHS05,GHS06 |
| Signal word | Danger |
| Hazard statements | H226-H302+H332-H311-H314 |
| Precautionary statements | P210-P280-P301+P312-P303+P361+P353-P304+P340+P310-P305+P351+P338 |
| Hazard Codes | C |
| Risk Statements | 10-20/21/22-34 |
| Safety Statements | 23-36-45 |
| RIDADR | UN 2054 8/PG 1 |
| OEB | A |
| OEL | TWA: 20 ppm (70 mg/m3), STEL: 30 ppm (105 mg/m3) [skin] |
| WGK Germany | 3 |
| RTECS | QD6475000 |
| Autoignition Temperature | 590 °F |
| TSCA | Yes |
| HS Code | 2934 99 90 |
| HazardClass | 8 |
| PackingGroup | I |
| Toxicity | LD50 orally in female rats: 1.05 g/kg (Smyth) |
| IDLA | 1,400 ppm [10% LEL] |
