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Periodic Table/Compounds/Naphthalene

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© Melvin Olsson 2025–2026
Data: IAEA & PubChem

Naphthalene

C₁₀H₈·128.174 g/mol·Organic·CID 931
AromaticCommon

Two fused benzene rings forming the simplest polycyclic aromatic hydrocarbon. Recognizable as the active ingredient in traditional mothballs. Sublimes readily, giving it a distinctive smell.

IUPAC: naphthalene

Also known as: 91-20-3, Naphthalin, Tar camphor, White tar, Albocarbon (+14 more)

2D structure of Naphthalene

Molecular Structure

Molecular Propertiesmass · H-bonds · stereo

Molecular Weight

128.170g/mol

Exact Mass

128.062600Da

Monoisotopic Mass

128.062600Da

XLogP

3.3

Polar Surface Area

0.0Ų

Complexity

80

Formal Charge

0

H-Bond Donors

0

H-Bond Acceptors

0

Rotatable Bonds

0

Heavy Atoms

10

Stereo Centers

0

Bond Stereo

0

Drug-Likeness (Lipinski's Rule of Five)

✓ 128.2 g/mol
MW ≤ 500
✓ 3.3
LogP ≤ 5
✓ 0
H-bond donors ≤ 5
✓ 0
H-bond acceptors ≤ 10

Passes all rules — good oral bioavailability predicted

GHS Hazard Classification

Danger
Irritant
Irritant
Health Hazard
Health Hazard
Environmental Hazard
Environmental Hazard
Flammable
Flammable
Hazards
  • H302Harmful if swallowed
  • H351Suspected of causing cancer
  • H400Very toxic to aquatic life
  • H410Very toxic to aquatic life with long lasting effects
  • H228Flammable solid
  • H320Causes eye irritation
  • H411Toxic to aquatic life with long lasting effects
  • H317May cause an allergic skin reaction
  • H370Causes damage to organs
  • H372Causes damage to organs through prolonged or repeated exposure

Source: PubChem GHS Classification. Always consult the SDS for handling.

Chemical IdentifiersSMILES · InChI

InChI

InChI=1S/C10H8/c1-2-6-10-8-4-3-7-9(10)5-1/h1-8H

Constituent Elements

C
CarbonZ=6
H
HydrogenZ=1

Isomers8 compounds with formula C₁₀H₈

2D structure of azulene

azulene

CID 9231 · 128.2 g/mol

2D structure of 1,2,3,4,5,6,7,8-octadeuterionaphthalene

1,2,3,4,5,6,7,8-octadeuterionaphthalene

CID 92148 · 136.2 g/mol

2D structure of 1-methylideneindene

1-methylideneindene

CID 75581 · 128.2 g/mol

2D structure of tricyclo[5.2.1.02,6]deca-1,3,6,8-tetraene

tricyclo[5.2.1.02,6]deca-1,3,6,8-tetraene

CID 120191 · 128.2 g/mol

2D structure of 1-ethenyl-4-ethynylbenzene

1-ethenyl-4-ethynylbenzene

CID 10942441 · 128.2 g/mol

2D structure of naphthalene

naphthalene

CID 12199710 · 129.2 g/mol

2D structure of 2-deuterionaphthalene

2-deuterionaphthalene

CID 6912029 · 129.2 g/mol

2D structure of 5-cyclopenta-2,4-dien-1-ylidenecyclopenta-1,3-diene

5-cyclopenta-2,4-dien-1-ylidenecyclopenta-1,3-diene

CID 10908294 · 128.2 g/mol

External Resources

PubChem ↗Wikipedia ↗