Naphthalene

CAS Number
91-20-3
EC Number
202-049-5
Chemical Formula
C10H8
Molecular Weight
128.17 g/mol

Description

Naphthalene (CAS 91-20-3), also known commercially as white tar and tar camphor, is a polycyclic aromatic hydrocarbon derived primarily from coal tar and petroleum refining. It functions as a chemical intermediate and precursor feedstock across a broad range of industrial manufacturing processes. In the pharmaceutical and agrochemical sectors, this compound serves as a key intermediate in synthesizing active ingredients, including fungicides and insecticides. It is also essential for producing drug compounds such as beta-blockers for medical applications.

Textile and leather processors use naphthalene-derived sulfonates as dispersants and leveling agents in dye baths. These chemical additives are critical for improving color uniformity across various fiber types and leather goods during the manufacturing cycle. In the printing and packaging industries, it contributes to the production of phthalocyanine pigments used in high-quality inks and coatings. These pigments are valued for their stability and vibrant color properties in commercial printing.

Moth-repellent blocks and fumigant formulations for storage protection represent a direct end-product application in consumer and industrial pest control. The material acts as an effective biocide to protect fabrics and stored goods from insect damage. The product is supplied as white flakes, pellets, or molten liquid for bulk industrial shipment. Technical grade is the most common specification, with purity levels typically ranging from ninety-six percent to over ninety-nine percent.

Refined grades meeting higher purity thresholds are available for pharmaceutical intermediate and specialty chemical manufacturing. These high-purity options ensure compliance with rigorous industrial standards for sensitive chemical synthesis and laboratory use.

Other Names (Synonyms)

white tar|tar camphor|Naphthene|Camphor tar|Mothballs|Tolboxane|Moth flakes

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

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Physical Properties

Melting Point 80.2 °C
Boiling Point 217.9 °C @ Press: 760 Torr
Density 1.162 g/cm³ @ Temp: 20 °C
Flash Point 174 °F
Appearance Naphthalene is a colorless to brown crystalline solid with a characteristic “moth ball” odor. Shipped as a molten solid.
Color White to almost white
Odor at 10.00 % in benzyl benzoate. pungent dry tarry
Form Faint beige to brown to salmon red powder
Water Solubility 30 mg/L (25 ºC)
Vapor Pressure 0.03 mm Hg ( 25 °C)
Refractive Index 1.5821
Log P 3.7 at 25℃

Documentation

Safety & Handling Learn More

Warning
GHS07· Irritant GHS08· Health Hazard GHS09· Environmental Hazard GHS02· Flammable

Hazard Statements

H228 Flammable solid
H302 Harmful if swallowed
H316 Causes mild skin irritation
H317 May cause an allergic skin reaction

Precautionary Statements

P203 Obtain, consult and follow expert instructions for use.
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P240 Ground and bond container and receiving equipment.
P241 Use explosion-proof [electrical/ventilating/lighting/…] equipment.

Trade & Regulatory

HS Code 29029010
UN Number 1334
ADR Class 4.1
Packing Group III
Storage Class 4.1B - Flammable solid hazardous materials
WGK (Germany) 3
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