1-Bronaphthalene

Structural formula

• Numbering system
• Physical property data
• Toxicological data
• Ecological data
• Molecular structure data
• Computing chemical data
• More
  • Properties and Stability
  • Storage method
  • Synthesis method
  • Purpose

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.