Refined Naphthalene

Refined Naphthalene (C₁₀H₈, CAS No. 91-20-3) is a premium-grade, crystalline white powder derived from crude naphthalene through advanced purification processes. Known for its characteristic mothball-like odor, this versatile aromatic hydrocarbon offers exceptional stability and purity, making it an essential raw material in industries ranging from construction and dyes to agriculture and consumer products. With a solidification point of at least 79.6°C (up to 79.9°C for ultra-high purity grades), refined naphthalene ensures reliable performance in demanding manufacturing environments.

Technical Specifications

Key Features and Benefits

Refined naphthalene stands out for its superior chemical properties and eco-conscious production methods. Here's what makes it a preferred choice:

High Purity Levels: 

Achieves 99%+ purity through zone refining or distillation, minimizing impurities for consistent results in sensitive processes.

Thermal Stability: 

Melting point of 79-82°C and boiling point of 218°C, ideal for high-temperature reactions without degradation.

Versatile Solubility: 

Easily dissolves in organic solvents, enhancing its utility in formulations like dyes and resins.

Cost-Effective Performance: 

Provides excellent value in large-scale production, reducing overall material costs in concrete admixtures and phthalic anhydride synthesis.

Applications and Uses

Refined naphthalene's broad reactivity makes it indispensable across multiple sectors. Key applications include:

Construction Materials: 

Primary component in sodium naphthalene sulfonate formaldehyde (SNF) superplasticizers, enabling high-performance concrete with improved workability and strength for bridges, dams, and high-rises.

Dyes and Pigments: 

Essential intermediate for producing beta-naphthol, phthalic anhydride, and azo dyes used in textiles and printing inks.

Agriculture and Pest Control: 

Formulated into mothballs, fumigants, and wood preservatives to protect crops, timber, and stored goods from insects and fungi.

Personal Care and Household Products: 

Used in tanning agents, disinfectants, and deodorizers for leather processing and home sanitation.

Other Industries: 

Serves as a building block for pharmaceuticals, resins, pyrotechnics, and surfactants in detergents and emulsions.

Frequently Asked Questions (FAQs)

What is refined naphthalene, and how does it differ from crude naphthalene?

Refined naphthalene is a purified form of the hydrocarbon C₁₀H₈, processed to remove impurities like sulfur and tar for higher purity (≥99%). Crude naphthalene, in contrast, contains 70-90% naphthalene and requires further distillation for industrial use.

What are the primary safety considerations when handling refined naphthalene?

Handle in well-ventilated areas with protective gear (gloves, goggles, respirators) to avoid inhalation or skin contact. It's combustible and may cause irritation; store below 50°C away from oxidizers. Always follow SDS guidelines for safe transport and disposal.

Is refined naphthalene environmentally friendly?

While naturally occurring, refined naphthalene should be used responsibly. Modern production emphasizes low-emission refining, and it's biodegradable under certain conditions. It complies with regulations like EPA guidelines for reduced VOC emissions in applications like moth repellents.

Can refined naphthalene be used in food or pharmaceutical applications?

No, refined naphthalene is strictly for industrial and non-food uses due to its toxicity potential. For pharma intermediates, only GMP-certified grades are suitable, and direct consumer exposure is avoided.

Where can I buy high-quality refined naphthalene?

Contact us via email mandy@czqidi.com for offer and sample. Global availability ensures competitive pricing and reliable delivery.