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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. Contact us for supply of Naphthalene Request Quote

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

Physical Properties

Melting Point80.2 °C
Boiling Point217.9 °C @ Press: 760 Torr
Density1.162 g/cm³ @ Temp: 20 °C
Flash Point174 °F
AppearanceNaphthalene is a colorless to brown crystalline solid with a characteristic “moth ball” odor. Shipped as a molten solid.
ColorWhite to almost white
Odorat 10.00 % in benzyl benzoate. pungent dry tarry
FormFaint beige to brown to salmon red powder
Water Solubility30 mg/L (25 ºC)
Vapor Pressure0.03 mm Hg ( 25 °C)
Refractive Index1.5821
Log P3.7 at 25℃

Safety & Handling

Warning
GHS07· IrritantGHS08· Health HazardGHS09· EnvironmentGHS02· Flammable

Hazard Statements

H228Flammable solid
H302Harmful if swallowed
H316Causes mild skin irritation
H317May cause an allergic skin reaction
H320Causes eye irritation
H335May cause respiratory irritation
H351Suspected of causing cancer
H370Causes damage to organs
H371May cause damage to organs
H372Causes damage to organs through prolonged or repeated exposure
H400Very toxic to aquatic life
H410Very toxic to aquatic life with long lasting effects
H411Toxic to aquatic life with long lasting effects

Precautionary Statements

P203Obtain, consult and follow expert instructions for use.
P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P240Ground and bond container and receiving equipment.
P241Use explosion-proof equipment.
P260Do not breathe dust/fume/gas/mist/vapours/spray.
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash … thoroughly after handling.
P270Do not eat, drink or smoke when using this product.
P271Use only outdoors or in a well-ventilated area.
P272Contaminated work clothing should not be allowed out of the workplace.
P273Avoid release to the environment.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P318IF exposed or concerned, get medical advice.
P319Get medical advice/attention if you feel unwell.
P321Specific treatment (see … on this label).
P330Rinse mouth.
P391Collect spillage.
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P317Get emergency medical help.
P352IF ON SKIN: Wash with plenty of water.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P316Get emergency medical help immediately.
P317Get emergency medical help.
P317Get emergency medical help.
P317If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P364Take off contaminated clothing and wash it before reuse.
P378Use … for extinction.
P233Store in a well-ventilated place. Keep container tightly closed.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code29029010
UN Number1334
ADR Class4.1
Packing GroupIII
Storage Class4.1B - Flammable solid hazardous materials
WGK (Germany)3