Naphthalene Powder Extra Pure

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SHORT DESCRIPTION

Naphthalene Powder Extra Pure is a fine, white to pale crystalline powder composed of high-purity naphthalene (C₁₀H₈), valued for its consistent quality and volatile aromatic properties. This form is particularly suitable for laboratory use, where controlled dosing and faster sublimation are required. The powder is widely utilized in organic synthesis, standardization experiments, and melting point calibration, owing to its stable molecular structure and high sublimation rate.

In industrial and technical contexts, naphthalene powder serves as a precursor in dye manufacturing, plasticizer production, and pesticide formulation. It is also used as a fumigant for controlling pests in storage environments, similar to its use in ball form, but with faster release due to the increased surface area. Despite its utility, the powder must be handled with care—used in well-ventilated areas, kept away from ignition sources, and stored in sealed containers—due to its flammability and potential health effects from prolonged inhalation.

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Category: LABORATORY CHEMICALS Tags: AromaticHydrocarbon, CrystalFormation, ExtraPure, LabUse, NaphthalenePowder, OrganicChemistry, SafetyChemical, SpecialtyLabChemicals, SublimationStudies, VolatileCompounds

Description

USES

PRIMARY USES:

Intermediate in the production of dyes, resins, and plastics.
Manufacturing of phthalic anhydride.

SECONDARY USES:

Pesticide and fumigant in controlled settings.
Additives in lubricants and fuels.

KEY PRODUCT FEATURES

KEY ATTRIBUTES

1. Basic Identification Attributes

Chemical Name: Naphthalene
CAS Number: 91-20-3
HS Code: 2902.90.00
Molecular Formula: C₁₀H₈
Synonyms: α-Naphthalene, White Tar, Naphthalin, Tar Camphor, Naphthene

2. Physical & Chemical Properties

Physical State: Solid (fine powder)
Color & Odor: White to pale brown powder with strong aromatic odor
Boiling Point: 218 °C
Melting Point: 80.2 °C
Density: ~1.14 g/cm³
Solubility: Insoluble in water; soluble in alcohol, ether, chloroform, benzene
pH Level: Not applicable (neutral organic compound)
Vapor Pressure: 0.087 mmHg at 25 °C
Flash Point: 79 °C (closed cup)
Autoignition Temperature: 527 °C
Viscosity: Not applicable (solid)

3. Safety & Hazard Attributes

Hazard Class (GHS):
- Flammable Solid (Category 2)
- Acute Toxicity, Oral (Category 4)
- Carcinogenicity (Category 2)
- Chronic Aquatic Toxicity (Category 1)
NFPA Ratings:
- Health: 2
- Flammability: 2
- Reactivity: 0
Exposure Limits:
- OSHA PEL: 10 ppm (50 mg/m³)
- ACGIH TLV: 10 ppm (skin)
Reactivity: Stable under normal conditions; avoid oxidizing agents and ignition sources

4. Storage & Handling Attributes

Storage Conditions: Store in a cool, dry, well-ventilated area away from open flames and heat
Incompatible Materials: Oxidizers such as nitric acid, chromates, and chlorine
Container Type: Use tightly sealed, chemically resistant containers
Shelf Life & Expiration Date: Stable for several years if stored properly
Special Handling Requirements: Use in a fume hood; wear gloves, goggles, and dust mask to avoid inhalation and skin contact

5. Regulatory & Compliance Attributes

Regulatory Status:
- EPA: Listed as hazardous air pollutant
- REACH: Registered substance
- OSHA: Listed hazardous chemical
- DOT: Regulated for transport
Hazard Symbols:
- Flame, Exclamation Mark, Health Hazard, Environment
Transportation Restrictions:
- UN Number: UN1334
- Hazard Class: 4.1 (Flammable Solid)
Waste Disposal Method: Dispose of according to local, regional, and national regulations under hazardous waste category (RCRA)

6. Environmental & Health Impact

Ecotoxicity: Highly toxic to aquatic organisms with long-lasting effects
Persistence in Environment: Volatile and semi-persistent; may accumulate in soil and sediments
Carcinogenicity/Mutagenicity:
- IARC: Group 2B (Possibly carcinogenic to humans)
- OSHA: Potential occupational carcinogen

Biodegradability: Moderate under aerobic conditions; slow in anaerobic environments

SAFETY HANDLING PRECAUTIONS

SAFETY PRECAUTIONS

Personal Protective Equipment (PPE):

Wear a lab coat, chemical-resistant gloves (e.g., nitrile), and protective goggles.
Use a suitable dust mask or operate within a fume hood to prevent inhalation of fine particles.

Handling:

Avoid generation of dust and avoid breathing it in.
Prevent contact with skin, eyes, and clothing.
Wash hands and face thoroughly after handling.
Do not eat, drink, or smoke when using this product.

Storage:

Store in a cool, dry, and well-ventilated area.
Keep the container tightly sealed and away from heat or ignition sources.
Store separately from oxidizing agents and acids.

FIRST AID MEASURES

Inhalation:

Remove to fresh air immediately.
If breathing is difficult, administer oxygen and seek medical attention.

Skin Contact:

Wash with soap and plenty of water.
Remove contaminated clothing.
Get medical attention if irritation develops.

Eye Contact:

Rinse cautiously with clean water for several minutes.
Remove contact lenses if present and easy to do.
Continue rinsing and seek medical help if irritation persists.

Ingestion:

Rinse your mouth thoroughly with water.
Do not induce vomiting.
Seek immediate medical advice—naphthalene is harmful if swallowed.

FIRE FIGHTING MEASURES

Flammability:

Flammable in powder form; fine dust can form explosive mixtures with air.

Extinguishing Media:

Use dry chemicals, foam, or CO₂.
Water spray may be used to cool containers but could spread dust.

Hazardous Combustion Products:

Emits carbon monoxide, carbon dioxide, and irritating fumes upon combustion.

Firefighter Protection:

Wear self-contained breathing apparatus (SCBA) and full fire-resistant gear.
Avoid inhaling combustion vapors or dust.