1. Physicochemical Properties and Purity Specifications

p-Dichlorobenzene (molecular formula: C6H4Cl2, CAS No.: 106-46-7) is a white crystalline solid in flake or granular form at ambient temperature and pressure. It possesses a characteristic camphor-like odor and readily volatilizes/sublimates. It has a molecular weight of 147.00, a boiling point of approximately 174 deg C, and is insoluble in water while easily soluble in ethanol, diethyl ether, benzene, and most organic solvents. It remains relatively stable under high temperatures or in a molten state, though contact with strong oxidizers must be avoided.

Key quality and purity control parameters for industrial-grade p-Dichlorobenzene:

• Main Assay (1,4-DCB): Not less than 99.8% (determined by Gas Chromatography, GC);

• Isomeric Impurities (1,2-DCB / 1,3-DCB): Total content of o-Dichlorobenzene and m-Dichlorobenzene controlled within 0.15% to guarantee reaction selectivity in downstream synthesis;

• Crystallization Point: Not lower than 52.5 deg C, reflecting high product purity;

• Moisture and Trace Impurities: Moisture content controlled within 0.05% with no mechanical impurities, preventing side reactions during high-temperature polymerization.

2. Primary Application Sectors

Owing to its highly symmetrical dichlorobenzene ring structure, p-Dichlorobenzene is widely utilized across modern chemical processing:

• Specialty Engineering Plastics (Polyphenylene Sulfide, PPS): Functions as the core monomer raw material for synthesizing polyphenylene sulfide (PPS). PPS exhibits high-temperature resistance, corrosion resistance, flame retardancy, and superior mechanical strength, widely applied in automotive, electrical/electronic, and aerospace sectors;

• Agrochemical and Pharmaceutical Intermediates: Applied in synthesizing intermediates for insecticides, herbicides, and fungicides; used in the pharmaceutical and dye industries as a key building block to manufacture 2,5-dichloronitrobenzene and related compounds;

• Daily Fine Chemicals: Leveraging its sublimation properties, it is commonly utilized in industrial and household mothproofing/anti-mold agents as well as air deodorizers.

3. Transportation, Storage, and Safety Protocols

p-Dichlorobenzene is classified as a Class 9 Miscellaneous Dangerous Good / Environmentally Hazardous Substance. It readily sublimates and poses long-term risks to aquatic environments, requiring adherence to strict handling protocols:

• Packaging Specifications: Packed in 25 kg woven bags or composite paper bags with inner polyethylene liners, or 500 kg / 1000 kg moisture-proof jumbo bags (ton bags) to ensure hermetic sealing against moisture and sublimation;

• Storage Conditions: Store in a cool, dry, and well-ventilated dedicated warehouse away from fire and heat sources (recommended storage temperature below 30 deg C). Keep shaded and strictly avoid co-storage with strong oxidizers and food-grade chemicals;

• Safety Handling: Operators must wear dust masks, safety goggles, and chemical-resistant gloves during handling and unpacking to avoid inhalation of high-concentration vapors and direct skin contact.

4. Quality Control and Documentation Standards

To maintain continuous production line stability for clients, each bulk shipment of p-Dichlorobenzene is accompanied by complete testing and compliance documentation:

• Certificate of Analysis (COA): Specifying main assay, isomer ratios, crystallization point, and moisture thresholds;

• Safety Data Sheet (MSDS / SDS): Fully aligned with GHS standards for safe handling and dangerous goods transport guidelines;

• Technical Data Sheet (TDS): Providing detailed physical/chemical indicators and analytical testing methods.

5. Bulk Supply and Business Contact

Wuxi High Mountain Hi-Tech Development Co., Ltd. specializes in the bulk supply and export of high-purity p-Dichlorobenzene and associated chemical intermediates. We provide full container load (FCL) shipping and customized moisture-proof palletized packaging to ensure consistent quality throughout ocean and long-distance transport.

Business Contact and Procurement Inquiries:

• Contact Person: Mr. Fan

• Mobile / WeChat / WhatsApp: +86-13382223993

• Office Line: +86-510-85881876

• E-mail: sales1@wxhmchem.com / Harold2@high-mountain.cn

• Official Website: www.wxhmchem.com

• Russian Market Platform: www.highmountainchemru.com