Chlorinated paraffin

Selecting the correct grade depends primarily on the chlorine content, which typically ranges from 42% to 70%. For PVC processing, Chlorinated Paraffin-52 (CP-52) is the industry standard as a secondary plasticizer to reduce costs while maintaining flexibility. For flame retardant applications in rubber or coatings, higher chlorine content (CP-70) is required as it releases more hydrochloric acid to suppress combustion. Always verify the thermal stability index; high-quality CP should not darken or decompose at processing temperatures up to 180°C-200°C.

Buyers must prioritize color stability (measured by the Platinum-Cobalt scale), where a lower value (e.g., <50 Hazen) indicates higher purity and fewer impurities. Ensure the product complies with REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) for the EU market, and check for Short-Chain Chlorinated Paraffin (SCCP) restrictions. Most international markets now mandate the use of Medium-Chain (MCCP) or Long-Chain (LCCP) variants due to environmental regulations. Request a Certificate of Analysis (COA) for every batch to verify viscosity, density, and acidity levels.

Chlorinated Paraffin acts as a cost-effective partial replacement for primary plasticizers like DOP or DOTP. By substituting up to 10-30% of expensive primary plasticizers with CP-52, manufacturers can significantly reduce raw material costs without compromising the mechanical properties of the end product. Additionally, its flame-retardant properties can reduce the need for expensive additives like Antimony Trioxide, further optimizing the Total Cost of Ownership (TCO).

Chlorinated Paraffin is generally classified as non-hazardous for transport (unless it contains specific additives), but it is an environmental pollutant (Marine Pollutant). Ensure the supplier uses high-density polyethylene (HDPE) drums or IBC tanks to prevent leakage. For bulk shipments, Flexitanks are a cost-effective option but require strict loading temperature controls to prevent the liquid from becoming too viscous in cold climates, which complicates unloading.

When sourcing via Made-in-China.com, prioritize Audited Suppliers who have undergone third-party verification by agencies like SGS or Bureau Veritas. Utilize the Secured Trading Service to ensure payments are only released after the buyer confirms receipt of goods. It is highly recommended to conduct a Pre-shipment Inspection (PSI) to test the chlorine percentage and thermal stability before the balance payment is made.

Chemical prices are highly sensitive to raw material costs (paraffin wax and chlorine gas). Negotiate based on formula-based pricing tied to market indices if signing long-term contracts. Request tiered pricing where the unit cost drops by 5-10% for full container loads (FCL) compared to LCL. Additionally, ask for free samples (1-2kg) to conduct laboratory compatibility tests with your specific resin grades before committing to a large order.