Chlorinated paraffin wax

Buyers must primarily focus on the Chlorine Content, typically ranging from 42% to 70%. For PVC applications, CPW-52 is the industry standard. Additionally, monitor Thermal Stability (measured by HCL release at 175°C), Viscosity (crucial for processing flow), and Color Index (measured by the Platinum-Cobalt scale; lower values indicate higher purity and less impact on the final product's appearance).

The choice depends on the desired function: as a Secondary Plasticizer in PVC products (cables, hoses, floorings) to reduce costs, or as a Flame Retardant in rubbers and coatings. For high-end applications like synthetic leather, a low-volatility grade is essential to prevent 'fogging' or surface migration. In metalworking fluids, high-chlorine grades (70%) are preferred for their Extreme Pressure (EP) additives properties.

Suppliers must provide a valid Material Safety Data Sheet (MSDS) and comply with REACH regulations for the EU market. It is critical to distinguish between Short-Chain Chlorinated Paraffins (SCCPs), which are restricted globally under the Stockholm Convention due to environmental toxicity, and Medium-Chain (MCCPs) or Long-Chain (LCCPs), which are the current industry standards for compliant sourcing.

Request a Certificate of Analysis (COA) for every batch. Key indicators of quality include a Refractive Index between 1.470 and 1.510 and a Density check. Professional buyers should also perform a Heat Stability Test to ensure the product does not darken or decompose during high-temperature extrusion or molding processes.

The most significant risks include Regulatory Non-compliance (importing restricted SCCPs by mistake) and Logistical Hazards. Since CPW is a chemical, ensure the supplier uses UN-approved packaging (such as IBC tanks or 250kg steel drums) to prevent leakage. Always verify the supplier's Export License for Hazardous Chemicals if applicable in their jurisdiction.

Pricing is highly sensitive to Liquid Paraffin and Chlorine gas market fluctuations. It is advisable to negotiate Formula-based Pricing for long-term contracts. For bulk orders, aim for FOB or CIF terms and request a Volume Discount of 5-10% for orders exceeding 20 Metric Tons. Always use secure payment methods like Letter of Credit (L/C) or Trade Terms offered on reputable platforms like Made-in-China.com.

CPW should be stored in a cool, dry, and well-ventilated warehouse away from direct sunlight and heat sources to prevent polymerization or darkening. During cross-border transit, ensure the containers are moisture-proof. For shipping to distant regions, consider the Lead Time (usually 15-30 days) and ensure the supplier provides DGM (Dangerous Goods Management) reports to facilitate smooth customs clearance.

Focus on suppliers with ISO 9001 and ISO 14001 certifications. On Made-in-China.com, prioritize Audited Suppliers who have undergone third-party onsite inspections. Review their Transaction History and request a Pre-shipment Inspection (PSI) by agencies like SGS or Intertek to verify that the chlorine content and viscosity match the agreed specifications before the balance payment is made.