Octamethylcyclotetrasiloxane d4

Buyers must prioritize purity levels, typically requiring ≥99% for high-end chemical synthesis. Key parameters include moisture content (≤100 ppm), refractive index (1.3960-1.3970), and acid value. Ensure the product is a clear, colorless liquid free from visible impurities to prevent side reactions in downstream silicone polymer production.

Due to its chemical nature, D4 must comply with REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) for the EU market. Suppliers should provide a comprehensive Material Safety Data Sheet (MSDS/SDS) and Certificate of Analysis (COA) for every batch. Ensure the manufacturer follows ISO 9001 for quality management and ISO 14001 for environmental standards, especially given the increasing regulatory scrutiny on siloxanes.

D4 is primarily used as a precursor for silicone polymers (PDMS). It is essential in the production of silicone rubbers, resins, and fluids. In the personal care industry, it serves as a volatile carrier in cosmetics, though buyers must be aware of regional concentration limits. It is also utilized in textile finishing agents and as an intermediate in electronic-grade chemicals.

D4 is a flammable liquid with a flash point around 54°C. It must be stored in cool, well-ventilated warehouses away from fire and heat sources. Use stainless steel or epoxy-lined drums to prevent contamination. The shelf life is generally 12-24 months if kept sealed; however, buyers should request nitrogen-blanketed packaging to maintain maximum stability and prevent moisture absorption.

D4 is classified as a Class 3 Flammable Liquid (UN 1993) for international transport. You must ensure the supplier uses UN-certified packaging and works with freight forwarders experienced in Dangerous Goods (DG). For bulk orders, ISO Tanks are the most cost-effective and secure method, while smaller quantities require 200L steel drums with proper hazard labeling.

Utilize Made-in-China.com’s secured payment services to protect your funds until delivery. Conduct third-party factory audits to verify production capacity and environmental compliance. It is highly recommended to request a pre-shipment inspection (PSI) by agencies like SGS or Intertek to verify the purity and volume before the final balance is paid.

Be aware that D4 is under environmental restriction in certain regions (like the EU and Canada) due to its PBT (Persistent, Bioaccumulative, and Toxic) profile. Always check the latest customs tariff codes (HS Code 293190) and local environmental import quotas. Negotiate Incoterms like CIF or DAP clearly to define who handles the complex hazardous goods customs clearance.

Prices are heavily influenced by the cost of silicon metal and methanol. To secure better rates, consider long-term procurement contracts or purchasing during market troughs. For bulk buyers, a volume-based discount of 5-10% is standard for orders exceeding 20 tons (one full container load). Always ask for a breakdown of the 'All-in' price, including DG surcharges and port handling fees.