China (Mainland)
High quality Naphthalene CAS NO.91-20-3
- Min.Order: 1 Kilogram
- Payment Terms: T/T,MoneyGram,Other
- Product Details
Keywords
- Naphthalene
- Naphthalin
- Naphthene
Quick Details
- ProName: High quality Naphthalene
- CasNo: 91-20-3
- Molecular Formula: C10H8
- Appearance: White to white crystal, crystal
- Application: Synthetic medicines, insecticides, fra...
- DeliveryTime: 4-15 workdays
- PackAge: 25kg per bag
- Port: Shnaghai Guangzhou
- ProductionCapacity: 400 Metric Ton/Month
- Purity: 98
- Storage: Shady, ventilated warehouse
- Transportation: by sea or air
- LimitNum: 1 Kilogram
Superiority
1,Best Quality:
Our products have exported to Germany, Spain, UK, USA, Australia, Middle East, and so on other countries, and we have got very good feedback from our customers.so you can trust us.
2, Payment method: for example T/T, Westerm Union,other
3, Excellent Service: Best service and after-sales service to all clients.
1)We will ship the goods within 5days after get your payments.If you want to cancel or change order, please tell me within 24hours after you finish the payment..
2)We will ship the goods that you order from us by DHL, UPS, TNT and EUB.We will decided to choose which courier depend on different countries.To find the best way to delivery the goods for you.
3)As usual you can get the goods with in 4-7days.If the goods were lost or not received for other reasons, please contact us immediately.
4,Fast and safe delivery:
Sample Order : As usual you can get the goods within 4-7days. We can send it via HKems, HK Air Post, DHL or other methods.
We have a professional and stable logistics, and we can deliver the package smoothly around 3 to 5 days.
Bulk Order: Shipped via sea or air, it's according to your requirement, delivery time is 7-15days after payment.
If you have any other questions to consult me,please not hesitate to contact me any times.
Details
Naphthalene physicochemical properties
Density 1.0±0.1 g/cm3
Boiling point 221.5±7.0 °C at 760 mmHg
Melting point 80-82 °C (lit.)
Molecular formula C10H8
Molecular weight 128.171
Flash point 78.9±0.0 °C
Precise quality 128.062607
LogP 3.45
Appearance traits White to off-white crystal, crystal
Steam density 4.4 (vs air)
Vapor pressure 0.2±0.2 mmHg at 25°C
Refractive index 1.632
Storage conditions
Storage Precautions Store in a cool, ventilated warehouse. Keep away from fire and heat. The temperature should not exceed 35 °C. The package is sealed. should be kept away from oxidizer, do not store together. Equipped with the appropriate variety and quantity of fire equipment. The storage area should be provided with suitable materials to contain spills.
Stability
1. Using vanadium pentoxide and potassium sulfate as a catalyst, silica gel as a carrier, and oxidizing with air at 385-390 ° C to obtain phthalic anhydride. Oxidation with chromium oxide in an acetic acid solution produces α-naphthoquinone. Hydrogenation produces tetralin, which is further hydrogenated to form decalin. Under the catalysis of ferric chloride, chlorine gas is introduced into the benzene solution of naphthalene to obtain α-chloronaphthalene. The action of chlorine under light produces tetrachlorinated naphthalene. The nitration of naphthalene is easier than benzene, and it can be carried out at room temperature. The main product is α-nitronaphthalene. The sulfonation product of naphthalene is related to temperature, and α-naphthalenesulfonic acid is obtained at a low temperature, and β-naphthalenesulfonic acid is mainly obtained at a relatively high temperature.
2. Naphthalene has less water solubility and is not easily absorbed, so its toxicity is not too strong. Inhalation of concentrated naphthalene vapor or naphthalene powder can promote vomiting, discomfort, and headache. In particular, damage to the cornea, causing small blisters and punctate turbidity, can also make the skin inflamed, and sometimes can cause pathological changes in the lungs, but also damage the kidneys, causing hematuria, but not carcinogenic. The maximum allowable concentration of naphthalene in the workplace is 10 x 10-6. The production equipment and containers should be sealed to prevent the escape of vapor powder and forced ventilation at the operating site. If poisoning occurs, immediately move to fresh air, drink hot water, make it vomit, perform artificial respiration, and send it to hospital for treatment.
3. Stability and stability
4. Incompatible materials Strong oxidizing agents (such as chromic anhydride, chlorate and potassium permanganate)
5. Polymerization hazard does not polymerize
Water solubility 30 mg/L (25 oC)
Molecular Structure
1, molar refractive index: 44.09
2, molar volume (cm3 / mol): 123.5
3, isotonic capacity (90.2K): 311.1
4, surface tension (dyne / cm): 40.2
5. Dielectric constant (F/m): 2.82
6, polarizability (10-24cm3): 17.48
Computing chemistry
1. Hydrophobic parameter calculation reference value (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 molecular polarity surface area 0
7. Number of heavy atoms: 10
8. Surface charge: 0
9. Complexity: 80.6
10. Number of isotope atoms: 0
11. Determine the number of atomic stereocenters: 0
12. Uncertainty of the number of atomic stereocenters: 0
13. Determine the number of chemical bond stereocenters: 0
14. Uncertain chemical bond number of stereocenters: 0
15. Number of covalent bond units: 1
More
1. Properties: white volatile crystals, mild aromatic smell, crude naphthalene has coal tar smell.
2. Melting point (°C): 80.1
3. Boiling point (°C): 217.9
4. Relative density (water = 1): 1.16
5. Relative vapor density (air = 1): 4.42
6. Saturated vapor pressure (kPa): 0.0131 (25 ° C)
7. Heat of combustion (kJ/mol): -4983
8. Critical temperature (°C): 475.2
9. Critical pressure (MPa): 4.05
10. Octanol/water partition coefficient: 3.01~3.59
11. Flash point (°C): 78.9
12. Ignition temperature (°C): 526
13. Upper explosion limit (%): 5.9 (vapor)
14. Lower explosion limit (%): 2.5g/m3 (dust); 0.9 (vapor)
15. Solubility: insoluble in water, soluble in anhydrous ethanol, ether, benzene.
16. Viscosity (mPa·s, 99.8oC): 0.7802
17. Flash point (oC, opening): 79
18. Flash point (oC, closed): 78.9
19. Heat of evaporation (KJ/mol, 167.7oC): 46.415
20. Heat of formation (KJ/mol, 25oC, solid): 78.50
21. Heat of formation (KJ/mol, 25oC, liquid): 96.38
22. Heat of formation (KJ/mol, 25oC, gas): 151.77
23. Heat of fusion (KJ/mol): 19.18
24. Specific heat capacity (KJ / (kg · K), -258oC, constant pressure): 0.046
25. Specific heat capacity (KJ/(kg·K), 87.5oC, constant pressure): 1.683
26. Specific heat capacity (KJ/(kg·K), 90oC, constant pressure): 1.775
27. Boiling point rise constant: 5.80
28. Conductivity (S/m): 4.35×10-10
29. Solubility (g/L, water, 0oC): 0.019
30. Solubility (g/L, water, 100oC): 0.030
31. Thermal conductivity (W / (m · K), 100 ≤ t ≤ 140 oC): (0.1654 ~ 1.163) × 10-4 t
32. Body expansion coefficient (K-1): 0.000853
33. Critical density (g·cm-3): 0.315
34. Critical volume (cm3·mol-1): 407
35. Critical compression factor: 0.265
36. Eccentricity factor: 0.302
37. Solubility parameter (J·cm-3) 0.5: 19.188
38.van der Waals area (cm2·mol-1): 8.420×109
39.van der Waals volume (cm3·mol-1): 74.640
40. Gas phase standard combustion heat (焓) (kJ·mol-1): -522.97
41. Gas phase standard claims heat (焓) (kJ·mol-1): 150.41
42. Gas phase standard entropy (J·mol-1·K-1): 333.26
43. Gas phase standard generation free energy (kJ·mol-1): 244.3
44. Gas phase standard hot melt (J·mol-1·K-1): 131.92
45. Crystal phase standard combustion heat (焓) (kJ·mol-1): -5156.30
46. Crystal phase standard claims heat (焓) (kJ·mol-1): 77.95
47. Crystalline standard entropy (J·mol-1·K-1): 167.40
48. Crystal phase standard generation free energy (kJ·mol-1): 200.87
49. Crystal phase standard hot melt (J·mol-1·K-1): 165.69
