1-Bronaphthalene
Structural formula
| Business number | 021W |
|---|---|
| Molecular formula | C10H7Br |
| Molecular weight | 207.07 |
| label |
α-Bronaphthalene, 1-bromonaphthalene, α-Bromonaphthalene, refrigerant, Solvent for substances with large molecular weight, Indicator for determining the degree of polymerization of polyethylene, heat carrier |
Numbering system
CAS number:90-11-9
MDL number:MFCD00003868
EINECS number:201-965-2
RTECS number:QJ1545000
BRN number:1906414
PubChem number:24891985
Physical property data
1. Properties: Colorless oily liquid with a stronger odor than naphthalene.
2. Boiling point (ºC, 101.3kPa): 281.1
3. Melting point (ºC): 6.2
4. Relative density (g/mL, 20 /4ºC): 1.4826
5. Refractive index (n20ºC): 1.6580
6. Refractive index (40ºC): 1.6490
7. Viscosity (mPa· s, 15ºC): 5.993
8. Viscosity (mPa·s, 30ºC): 4.03
9. Flash point (ºC): 152
10. Ignition point (ºC): None
11. Heat of fusion (KJ/kg, 15ºC): 85.79
12. Heat of combustion (KJ/kg): 24285.5
13. Specific heat capacity (KJ/(kg·K), 16.84ºC, constant pressure): 1.33
14. Specific heat capacity (KJ/(kg·K), 36.84ºC, constant pressure): 1.35
14. p>
15. Solubility (g/100g, water, 25ºC): <0.1
16. Solubility: Slightly soluble in water, soluble in methanol, ether, butylamine, acetone, benzene , carbon tetrachloride, tributylamine and other solvents.
17. Relative density (25℃, 4℃): 1.472830
18. Liquid phase standard hot melt (J·mol– 1·K-1): 246.9
Toxicological data
Human intraperitoneal injection of LD50810mg/kg.
Ecological data
None
Molecular structure data
1. Molar refractive index: 51.78
2. Molar volume (cm3/mol): 139.7
3. Isotonic specific volume (90.2K ): 361.6
4. Surface tension (dyne/cm): 44.8
5. Polarizability (10-24cm3): 20.52
Compute chemical data
1. Hydrophobic parameter calculation reference value (XlogP): 4.3
2. Number of hydrogen bond donors: 0
3, Number of hydrogen bond acceptors: 0
4, Number of rotatable chemical bonds: 0
5, Mutual Number of isomers:
6. Topological molecular polar surface area (TPSA): 0
7. Number of heavy atoms: 11
8. Surface charge : 0
9. Complexity: 133
10. Number of isotope atoms: 0
11. Determine the number of atomic stereocenters: 0
12. The number of uncertain atomic stereocenters: 0
13. The number of determined chemical bond stereocenters: 0
14. The number of uncertain chemical bond stereocenters: 0
15. Number of covalent bond units: 1
Properties and stability
Human intraperitoneal injection of LD50810mg/kg. Wear butyl rubber gloves, self-contained breathing apparatus, protective clothing and long protective boots.
Storage method
This product should be sealed and stored away from light. This product can burn in open flames when exposed to high heat. It should be stored in a cool, ventilated warehouse, away from fire and heat sources. It should be stored separately from oxidants and strong acids. It should be handled and unloaded with care. Keep packaging intact.
Synthesis method
Obtained from the reaction of naphthalene and bromine. Add carbon tetrachloride and naphthalene to the reaction pot, stir and heat, and slowly add bromine at 45°C. After the addition is completed, incubate the reaction at 70-80°C for 3-4 hours. Distillation is used to recover carbon tetrachloride, and the reactants are washed, distilled under reduced pressure, washed again, filtered, and dried to obtain the finished product.
Purpose
Organic synthesis raw materials, analytical reagents, used as refrigerants and solvents for substances with large molecular weight. It is also a heat carrier for drying items. It can also be used for refractive index measurement. It is also used as an indicator for measuring the degree of polymerization of polyethylene.
