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Naphthalene

Naphthalene structure

CAS No:
91-20-3
Formula:
C10H8
Chemical Name:
Naphthalene
Synonyms:
Naphthalene;Moth flakes;Tar camphor;White tar;Albocarbon;Dezodorator;Naphthene;NSC 37565;72931-45-4
Categories:
Organic Chemistry > Hydrocarbons and Derivatives

Description

Naphthalene is a crystalline, white, flammable, polycyclic aromatic hydrocarbon consisting of two fused benzene rings. It has a pungent odor and sublimes readily above its melting point; it has been traditionally used in moth balls and is responsible for the moth balls characteristic odor. Naphthalene is a natural component of fossil fuels and is the single most abundant component of coal tar, accounting for approximately 11% of dry coal tar. Naphthalene is a colorless to brown crystalline soli

Naphthalene Basic Attributes

Molecular Weight：

128.17100

Exact Mass：

128.17

EC Number：

939-601-6

HScode：

2707400000

Characteristics

PSA：

XLogP3：

2.83980

Appearance：

Naphthalene appears as a white crystalline volatile solid with a strong coal-tar odor. The solid is denser than water and insoluble in water. Burns, but may be difficult to ignite. . In the molten form it is very hot. Exposure to skin must be avoided. Also the vapors given off by the material may be toxic. Used as a moth repellent, fumigant, lubricants, and to make other chemicals, and for many other uses

Density：

1.162 g/cm³ @ Temp: 20 °C

Melting Point：

80.2 °C

Boiling Point：

217.9 °C @ Press: 760 Torr

Flash Point：

78ºC

Refractive Index：

1.5821

Water Solubility：

H2O: 30 mg/L (25 ºC)

Storage Conditions：

APPROX 4ºC

Vapor Pressure：

0.03 mm Hg ( 25 °C)

Vapor Density：

4.4 (vs air)

Toxicity：

Acute oral LD 50 for guinea pigs 1,200 mg/kg, mice 533 mg/kg, rats 1,250 mg/kg (quoted, RTECS, 1985).

Flammability characteristics：

Combustible Solid, but will take some effort to ignite.

Explosive limit：

vol% in air: 0.9.9

Odor：

Aromatic odor

Safety Information

Packing level：

III

Hazard category：

4.1

Transport codes：

UN 1334 4.1/PG 3

wgk germany：

hazard class code：

R22; R40; R50/53

safety instructions：

S36/37-S46-S60-S61

RTECS Number：

QJ0525000

Marks：

Xn; N

Storage features：

Separated from strong oxidants and food and feedstuffs. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing.

Stability/Shelf Life：

Stable under recommended storage conditions.

Precautionary statement(s)：

P210-P280-P301 + P312 + P330-P370 + P378

Hazard Statements：

H228-H302-H351-H410

Naphthalene Use and Manufacturing

Naphthalene was used in liquid-phase exfoliation of graphite in organic solvents for the production of graphene sheets. It was used in preparation of carbon-coated Si 70 Sn 30 nanoparticles. It was used as fluorescent probe to study the aggregation behavior of sodium cholate. It was used to investigate influence of added short chain linear and branched alcohols on the binding of 1:1 complex of naphthalene and 尾-cyclodextrin.

Computed Properties

Molecular Weight:128.17
XLogP3:3.3
Exact Mass:128.062600255
Monoisotopic Mass:128.062600255
Heavy Atom Count:10
Complexity:80.6
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

Material

Kaolin

Ethylene

PETROLEUM ETHER

Downstream Products

1-Naphthylamine

2-Naphthol

Benzoic acid

Isopentane

Phthalic anhydride

Price Analysis

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