benz[a]anthracene benz(a)anthracene
![benzo[a]anthracene structural formula](https://www.bdmaee.net/wp-content/uploads/2024/01/49f39a7c8ce34a94bcdec6d50ee013d4.gif)
structural formula
| business number | 017r |
|---|---|
| molecular formula | c18c12 |
| molecular weight | 228.29 |
| label |
1,2-benzanthracene, tetraphene, benz[a]anthracene, naphthanthracene, aromatic hydrocarbons |
numbering system
cas number:56-55-3
mdl number:mfcd00003599
einecs number:200-280-6
rtecs number:cv9275000
brn number:1909298
pubchem number:24847436
physical property data
1.characteristics: white or light yellow flaky crystals. there is yellow-green fluorescence. can be sublimated.
2. melting point (ºc): 160.5
3. refractive index: undetermined
4. flash point (ºc): undetermined
5. specific rotation (º): undetermined
6. autoignition point or ignition temperature (ºc): undetermined
7. vapor pressure (kpa , 25ºc): not determined
8. saturated vapor pressure (kpa, 60ºc): not determined
9. heat of combustion (kj/mol): undetermined
10. critical temperature (ºc): undetermined
11. critical pressure (kpa): undetermined
12. the logarithmic value of the oil-water (octanol/water) partition coefficient: undetermined
13. explosion upper limit (%, v/v): undetermined
14. lower explosion limit (%, v/v): undetermined
15. solubility: soluble in most organic solvents, difficult to soluble in acetic acid and hot ethanol, insoluble in water.
16. standard heat of combustion (enthalpy) of crystalline phase (kj·mol-1): -8969.0
17. crystal phase standard claims heat (enthalpy) (kj·mol-1): 170.8
18. gas-phase standard combustion heat (enthalpy) (kj·mol-1): -9091.2
19. gas phase standard claims heat (enthalpy) (kj·mol-1): 293.0
toxicological data
none yet
ecological data
none yet
molecular structure data
1. molar refractive index: 79.78
2. molar volume (cm3/mol): 191.7
3. isotonic specific volume (90.2k ): 518.7
4. surface tension (dyne/cm): 53.5
5. dielectric constant (f/m): 3.24
6. extreme chemical rate (10-24cm3): 31.62
calculate 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: 0
5. number of tautomers: none
6. topological molecule polar surface area 0
7. number of heavy atoms: 18
8. surface charge: 0
9. complexity: 294
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
storage method
this product should be sealed and stored in a cool, dry place.
synthesis method
1. this product exists in coal tar, coal tar pitch, creosote, and is pyrolyzed at 700°c by coking, various coal-burning flue gases, automobile engine exhaust, and carbohydrates, amino acids, and fatty acids. benzo(a)anthracene is present.
2. obtain flakes from glacial acetic acid or ethanol.
purpose
used in organic synthesis.
