Methyl ether
Structural formula
| Business number | 05KC |
|---|---|
| Molecular formula | C3H8O |
| Molecular weight | 60.10 |
| label |
methoxyethane, Methyl ether, Methyl ethyl ether, methoxyethane, Methyl ethyl ether, 1-Methoxyethane |
Numbering system
CAS number:540-67-0
MDL number:None
EINECS number:None
RTECS number:KO0260000
BRN number:None
PubChem ID:None
Physical property data
1. Properties: colorless gas or liquid [1]
2. Melting point (℃): -113[2]
3. Boiling point (℃): 7.4[3]
4. Relative density (water=1): 0.73[4]
5. Relative vapor density (air=1): 2.1[5]
6. Saturated vapor pressure (kPa): 53.32 (-7.8 ℃)[6]
7. Heat of combustion (KJ/mol): -2105.4[7]
8. Critical temperature (℃): 164.7[8]
9. Critical pressure (MPa): 4.40[9]
10. Octanol/water partition coefficient: 0.56[10]
11. Flash point (℃): -37 (CC)[11]
12. Ignition temperature (℃): 190[12]
13. Explosion upper limit (%, V/V): 10.1 [13]
14. Lower explosion limit (%, V/V): 2.0[14]
15. Solubility: soluble In water, miscible in ethanol and ether. [15]
16. Critical density (g·cm-3): 0.271
17. Critical volume (cm 3·mol-1): 222
18. Critical compression factor: 0.267
19. Eccentricity factor: 0.219
20. Gas phase standard combustion heat (enthalpy) (kJ·mol-1): -2107.4
21. Gas phase standard claimed heat (enthalpy) (kJ ·mol-1): -216.4
22. Gas phase standard entropy (J·mol-1·K-1): 309.25
23. Gas phase standard formation free energy (kJ·mol-1): -117.0
24. Gas phase standard hot melt (J ·mol-1·K-1): 93.30
Toxicological data
1. Acute toxicity[16] LC50: 1082mg/m3 (mouse inhalation, 15min )
2. Irritation No information available
Ecological data
1. This substance may be harmful to the environment, and special attention should be paid to water bodies.
2. Ecotoxicity No data available
3. Biodegradability No data
4. Non-biodegradability[17] In the air, when the hydroxyl radical concentration is 5.00×105 pcs/cm3, the degradation half-life is 2.3d (theoretical).
Molecular structure data
1. Molar refractive index: 17.69
2. Molar volume (cm3/mol): 84.4
3. Isotonic specific volume (90.2K ):171.1
4. Surface tension (dyne/cm): 16.9
5. Polarizability (10-24cm3):7.01
Compute chemical data
1. Reference value for hydrophobic parameter calculation (XlogP): 0.4
2. Number of hydrogen bond donors: 0
3. Number of hydrogen bond acceptors: 1
4. Number of rotatable chemical bonds: 1
5. Number of tautomers: none
6. Topological molecule polar surface area 9.2
7. Number of heavy atoms: 4
8. Surface charge: 0
9. Complexity: 7.2
10. Number of isotope atoms: 0
11. Determine the number of atomic stereocenters: 0
12. Uncertain number of atomic stereocenters: 0
13. Determine the number of chemical bond stereocenters: 0
14. Number of uncertain chemical bond stereocenters: 0
15. Number of covalent bond units: 1
Properties and stability
1. Stability[18] Stable
2. Incompatible substances [19] Strong oxidants, strong acids, halogens, sulfur, sulfides
3. Polymerization hazard[ 20] No aggregation
Storage method
Storage Precautions[21] Store in a cool, ventilated warehouse dedicated to flammable gases. Keep away from fire and heat sources. The storage temperature should not exceed 30℃. They should be stored separately from oxidants, acids, and halogens. Do not store them together and should not be stored for a long time. Use explosion-proof lighting and ventilation facilities. It is prohibited to use mechanical equipment and tools that are prone to sparks. The storage area should be equipped with leakage emergency response equipment.
Synthesis method
Purpose
Used in medicine (narcotics). [22]