2-Pentene 2-Pentene
Structural formula
| Business number | 02ZH |
|---|---|
| Molecular formula | C5H10 |
| Molecular weight | 70.13 |
| label |
CH3CH2CH=CHCH3, beta-n-Amylene, polymerization inhibitor |
Numbering system
CAS number:109-68-2
MDL number:MFCD00009384
EINECS number:203-695-0
RTECS number:None
BRN number:969151
PubChem number:24848610
Physical property data
1. Properties: Colorless highly volatile liquid [1]
2. Melting point (℃): -139[2]
3. Boiling point (℃): 37[3]
4. Relative density (water=1): 0.65[4]
5. Relative vapor density (air=1): 2.41[5]
6. Saturated vapor pressure (kPa): 55.5 (20 ℃)[6]
7. Critical temperature (℃): 202.4[7]
8. Critical pressure ( MPa): 4.09[8]
9. Octanol/water partition coefficient: 2.58[9]
10. Flash point (℃): -45.6[10]
11. Explosion upper limit (%): No data yet
12. Explosion lower limit (%) : 1.4[11]
13. Solubility: Insoluble in water, miscible in ethanol and ether. [12]
Toxicological data
1. Acute toxicity No data available
2. Irritation No data available
3. Subacute and chronic toxicity[13] Rat inhaled pentene 0.01g/m3 day and night for 2.5 months, first excited and then inhibited, conditioned reflex Disorders, serum cholinesterase activity decreases, urinary porphyrin increases, and pulmonary bronchitis and interstitial inflammation are also seen.
Ecological data
1. Ecotoxicity No data available
2. Biodegradability No data available
3 .Non-biodegradability No information available
4. Other harmful effects[14] This substance may be harmful to the environment and should be Pay special attention to contamination of surface water, soil, atmosphere and drinking water.
Molecular structure data
1. Molar refractive index: 25.27
2. Molar volume (cm3/mol): 104.6
3. Isotonic specific volume (90.2K ): 218.2
4. Surface tension (dyne/cm): 18.9
5. Dielectric constant (F/m): 2.60
6. Polar Chemical rate (10-24cm3): 10.01
Compute chemical data
1. Reference value for hydrophobic parameter calculation (XlogP): 2.1
2. Number of hydrogen bond donors: 0
3. Number of hydrogen bond acceptors: 0
4. Number of rotatable chemical bonds: 1
5. Number of tautomers:
6. Topological molecular polar surface area (TPSA): 0
7. Number of heavy atoms: 5
8. Surface charge: 0
9. Complexity: 27
10. Number of isotope atoms: 0
11. The number of determined atomic stereocenters: 0
12. The number of uncertain atomic stereocenters: 0
13, The number of determined stereocenters of chemical bonds: 0
14, The number of uncertain stereocenters of chemical bonds: 0
15, The number of covalent bond units: 1
Properties and stability
1. Stability[15] Stable
2. Incompatible substances[16] Oxidants, acids, halogenated hydrocarbons, halogens, etc.
3. Conditions to avoid contact[17] Heating
4. Aggregation hazards[18] Aggregation
Storage method
Storage Precautions[19] Store in a cool, ventilated warehouse. Keep away from fire and heat sources. The storage temperature should not exceed 29°C. The packaging must be sealed and must not come into contact with air. They should be stored separately from oxidants and acids, and avoid mixed storage. 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 emergency release equipment and suitable containment materials.
Synthesis method
None yet
Purpose
Used in organic synthesis and as polymerization inhibitor. [20]