Structural formula
Business number | 036Y |
---|---|
Molecular formula | C20H42 |
Molecular weight | 282.55 |
label |
N-eicosane, Icosane, n-Eicosane, chromatography reagents, linear compound |
Numbering system
CAS number:112-95-8
MDL number:MFCD00009344
EINECS number:204-018-1
RTECS number:None
BRN number:1700722
PubChem number:24868388
Physical property data
1. Properties: colorless crystal or white waxy solid
2. Density (g/mL, 25℃): 0.7886
3. Relative vapor density (g/ mL, air = 1): Undetermined
4. Melting point (ºC): 36.8
5. Boiling point (ºC, normal pressure): 343
6 . Boiling point (ºC, KPa): Undetermined
7. Refractive index (n20/D): 1.4425
8. Flash point (ºC): >110
9. Specific rotation (ºC): Undetermined
10. Autoignition point or ignition temperature (ºC): Undetermined
11. Vapor pressure (mmHg, 38ºC): Undetermined
12. Saturated vapor pressure (kPa, ºC): Undetermined
13. Heat of combustion ( KJ/mol): Undetermined
14. Critical temperature (K): 494.85
15. Critical pressure (MPa): 1.07
16. Eccentricity factor : 0.876
17. Explosion upper limit (%, V/V): Undetermined
18. Explosion lower limit (%, V/V): Undetermined
19. Solubility: Easily soluble in acetone, soluble in benzene and ether, insoluble in water.
Toxicological data
None
Ecological data
No harm to water bodies.
Molecular structure data
5. Molecular property data:
1. Molar refractive index: 94.70
2. Molar volume (cm3/mol): 358.6
3. Isotonic specific volume (90.2K): 827.8
4. Surface tension (dyne/cm): 28.3
5. Dielectric constant (F/m ): 2.08
6. Polarizability (10-24cm3): 37.54
Compute chemical data
1. Reference value for hydrophobic parameter calculation (XlogP): None
2. Number of hydrogen bond donors: 0
3. Number of hydrogen bond acceptors: 0
4. Number of rotatable chemical bonds: 17
5. Number of tautomers: none
6. Topological molecule polar surface area 0
7. Number of heavy atoms: 20
8. Surface charge: 0
9. Complexity: 132
10. Number of isotope atoms: 0
11. Determine the number of atomic stereocenters: 0
12.��Determine the number of atomic stereocenters: 0
13. Determine the number of chemical bond stereocenters: 0
14. Uncertain number of chemical bond stereocenters: 0
15. Number of covalent bond units: 1
Properties and stability
1. Avoid contact with oxides.
2. Found in flue-cured tobacco leaves.
Storage method
Stored in a cool, ventilated warehouse. Keep away from fire and heat sources. They should be stored separately from oxidants, etc. and avoid mixed storage. Equipped with corresponding varieties and quantities of
fire-fighting equipment. The storage area should be equipped with emergency release equipment and suitable containment materials.
Synthesis method
1. Tobacco: FC, 18; FC, 26; FC, 40
2. Preparation method:
org/internal/day_121107/201211071458194958.gif” alt=”” /> up>wAnhydrous 1 -Brodecane (2), add 70g of metallic sodium in batches at 120~140℃ (cut into small pieces, each piece is about 3g). Add one piece at a time and wait until the reaction is complete before adding another piece. After the sodium metal reaction is completed, continue stirring for 30 minutes. Slowly add cold ethanol dropwise to decompose unreacted sodium metal. The upper oil layer was separated, washed twice with hot water, dried over anhydrous sodium sulfate, fractionated under reduced pressure, and the fractions at 193-198°C were collected to obtain 150g of n-eicosane (1), with a yield of 51%. [1]
Purpose
Gas chromatography analysis standards, gas chromatography stationary solutions. Organic Synthesis.