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Naphthalene

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Identification
Molecular formula
C10H8
CAS number
91-20-3
IUPAC name
naphthalene
State
State
Naphthalene is in a solid state at room temperature. It sublimes easily under ambient conditions, meaning it can transition from a solid to a gaseous state without becoming a liquid first.
Melting point (Celsius)
80.26
Melting point (Kelvin)
353.41
Boiling point (Celsius)
218.00
Boiling point (Kelvin)
491.15
General information
Molecular weight
128.17g/mol
Molar mass
128.1730g/mol
Density
1.0250g/cm3
Appearence
Naphthalene typically appears as white, plate-like crystalline structures. It is known for its characteristic strong, pungent, and aromatic odor. Upon exposure to light, the crystals can become slightly yellowish.
Comment on solubility

Solubility of Naphthalene (C10H8)

Naphthalene is a polycyclic aromatic hydrocarbon known for its distinct characteristics. When considering its solubility, it is important to note that this compound behaves distinctly in various solvents:

  • Solvent Characteristics: Naphthalene is generally insoluble in water due to its nonpolar nature; however, it is soluble in organic solvents such as:
    • Alcohols
    • Ether
    • Acetone
    • Chloroform
  • Temperature Effect: The solubility of naphthalene increases with temperature; as the temperature rises, naphthalene becomes more soluble in organic solvents. Thus, it can be beneficial to heat the solvent to improve dissolution.
  • Environmental Concerns: Naphthalene can evaporate quickly from aqueous solutions, contributing to air pollution. Moreover, it shows moderate toxicity to aquatic organisms, indicating that its solubility influences its environmental impact.

In summary, naphthalene's solubility profile is a classic example of solubility principles influenced by polarity and temperature, making it a compound of interest in both chemical and environmental studies.

Interesting facts

Interesting Facts about Naphthalene

Naphthalene is a fascinating organic compound that has captured the interest of chemists and researchers for its unique properties and applications. Here are some intriguing aspects you may find interesting:

  • Historical Significance: Naphthalene was first identified in the early 19th century, derived from coal tar. Its structure and properties were pivotal in the development of organic chemistry, leading to advancements in the understanding of aromatic compounds.
  • Common Uses: Its most well-known application is as a key ingredient in the production of mothballs. Naphthalene’s strong odor is effective in repelling moths and other insects, making it a common household product.
  • Industrial Applications: Beyond mothballs, naphthalene is used in various industrial processes, including the manufacturing of dyes, plastics, and fragrances. Its versatility makes it a valuable compound in chemical synthesis.
  • Biological Activity: Interestingly, naphthalene has shown some biological activity. Research suggests that it possesses anti-bacterial and anti-cancer properties, leading to potential applications in pharmaceuticals, though it also raises concerns regarding toxicity.
  • Toxicity and Safety: Safety is a prime concern with naphthalene, as exposure can lead to health issues such as skin irritation, hemolytic anemia, and respiratory problems. Proper precautions and handling are essential when working with this compound.

As expressed by one chemist, "Naphthalene not only serves as a bridge between coal and modern chemistry, but it also exemplifies the dual nature of chemicals—of beauty and hazard." This duality makes naphthalene a compound worthy of further study and appreciation in the field of chemistry.

Synonyms
naphthalene
91-20-3
Naphthalin
Albocarbon
Tar camphor
White tar
Naphthene
Naphthaline
Camphor tar
Moth balls
Moth flakes
naphtalene
Dezodorator
Naftalen
Mighty 150
Naphthalinum
RCRA waste number U165
Mighty RD1
naftaleno
naftalina
naphtaline
naphthalen
napthalene
Naphtalinum
Mothballs
Caswell No. 587
NCI-C52904
Naphthalene, pure
NSC 37565
CCRIS 1838
HSDB 184
Naphtalene [ISO:French]
EINECS 202-049-5
NSC-37565
EPA Pesticide Chemical Code 055801
UNII-2166IN72UN
DTXSID8020913
CHEBI:16482
AI3-00278
2166IN72UN
MFCD00001742
Naphthalene-1,2,3,4-13C4
UN1334
CHEMBL16293
DTXCID00913
EC 202-049-5
NSC37565
Naphthalene, 99%
NCGC00090793-02
287399-39-7
Naphtalene (ISO:French)
NAPHTHALENE (IARC)
NAPHTHALENE [IARC]
NAPHTHALENE (MART.)
NAPHTHALENE [MART.]
Naftalen [Polish]
NAPHTHALENE (USP-RS)
NAPHTHALENE [USP-RS]
Naphthalene, analytical standard
Naphthalene [BSI:ISO]
C10H8
CAS-91-20-3
Naphthalene, molten
Naphthalene (molten)
UN2304
RCRA waste no. U165
NAPHTHALENE (1,2,3,4,5,6,7,8-D8)
Naphthalene, crude or refined
2-naphthalen
1-Naphthalene
2-Naphthalene
Na-Cemmix
Naphthalene,(S)
Naphthalene, 98%
1,4-naphthalenediyl
NAPHTHALENE [MI]
NAPHTHALENE [ISO]
NAPHTHALENE [HSDB]
NAPHTHALENE, REFINED
NAPHTHALINUM [HPUS]
NAPHTHALENE [WHO-DD]
MLS001055498
WLN: L66J
BIDD:ER0665
DTXSID201315549
HMS3039N15
Tox21_111023
Tox21_202004
Tox21_300008
BDBM50159249
Naphthalene, for synthesis, 98.5%
STL282720
AKOS000119977
USEPA/OPP Pesticide Code 055801
FN10260
Naphthalene 100 microg/mL in Methanol
UN 1334
UN 2304
Naphthalene 10 microg/mL in Cyclohexane
NCGC00090793-01
NCGC00090793-03
NCGC00090793-04
NCGC00090793-05
NCGC00254058-01
NCGC00259553-01
BS-22320
Naphthalene 10 microg/mL in Acetonitrile
SMR000677944
Naphthalene 100 microg/mL in Acetonitrile
Naphthalene, SAJ first grade, >=98.0%
DB-361346
N0004
N0885
NS00008377
EN300-21626
C00829
D97670
SBI-0654024.0001
Naphthalene, suitable for scintillation, >=99%
L001166
Naphthalene, molten [UN2304] [Flammable solid]
Q179724
SR-01000854997
Melting point standard 79-81C, analytical standard
SR-01000854997-2
F0001-2217
Naphthalene, certified reference material, TraceCERT(R)
Z104506008
Naphthalene, crude or refined [UN1334] [Flammable solid]
Naphthalene, United States Pharmacopeia (USP) Reference Standard
InChI=1/C10H8/c1-2-6-10-8-4-3-7-9(10)5-1/h1-8
Naphthalene, Pharmaceutical Secondary Standard; Certified Reference Material
202-049-5
31807-65-5