Sodium petroleum sulfonate

Buyers must prioritize the Active Content (typically 50%-70%), Mineral Oil Content, and Water Content (usually <5%). The Average Molecular Weight is critical as it determines the application: low molecular weight (400-450) is better for detergency and wetting, while high molecular weight (>500) is superior for corrosion inhibition and emulsification.

It is primarily used as a surfactant, emulsifier, and rust preventive. Key scenarios include the production of soluble cutting oils, textile oils, ore flotation agents, and anti-rust greases. In the automotive sector, it serves as a vital dispersant in engine oil additives to prevent sludge buildup.

Ensure the supplier provides a valid SDS (Safety Data Sheet) compliant with GHS standards. For international trade, verify the HS Code (usually 3402.11) and check for REACH registration if exporting to the EU. Since it is a chemical product, ensure the packaging meets UN-certified standards for liquid chemicals to prevent leakage during transit.

Request a Certificate of Analysis (COA) for every batch. Key performance indicators to test include alkalinity (TBN) and viscosity at 100°C. It is highly recommended to use third-party inspection services (like SGS or Intertek) to perform pre-shipment sampling to verify that the chemical composition matches the agreed-upon specifications.

The main risks include logistical delays due to hazardous material classification and quality degradation if stored in extreme temperatures. Always confirm if the product is classified as Dangerous Goods (DG) for shipping, as this significantly impacts freight costs and port handling requirements.

Focus on volume-based pricing tiers; for chemical raw materials, a 5-10% discount is often achievable for Full Container Load (FCL) orders. Negotiate for free samples (buyer pays shipping) to conduct lab testing before committing to a bulk contract. Request transparency regarding the base oil source used in production to ensure long-term price stability.

Utilize secured payment terms such as Letter of Credit (L/C) or escrow-based services provided by Made-in-China.com to protect your funds. For shipping, choose FOB (Free On Board) to maintain control over the shipping line and insurance, ensuring the carrier is experienced in handling liquid chemical drums or IBC tanks.