Propylene glycol price

Propylene Glycol is generally categorized into two main grades: USP/EP Grade (Pharmaceutical/Food Grade) and Industrial Grade (PGI). USP Grade is essential for food additives, pharmaceuticals, cosmetics, and vaping liquids, requiring a purity of ≥99.5%. Industrial Grade is widely used in unsaturated polyester resins, engine coolants, antifreeze, and de-icing fluids. Buyers must match the grade to their specific application to ensure safety and chemical compatibility.

For food and pharma applications, ensure the supplier complies with USP (US Pharmacopeia), EP (European Pharmacopoeia), or FCC (Food Chemicals Codex) standards. Key certifications include ISO 9001 for quality management, HACCP or ISO 22000 for food safety, and KOSHER/HALAL if targeting specific dietary markets. Always request a Certificate of Analysis (COA) for every batch to verify purity, moisture content, and heavy metal limits.

The purity level (typically 99.5% to 99.9%) is the primary price driver. Higher purity reduces secondary reactions in chemical synthesis. Moisture content (typically <0.1%) is critical for polyurethane production; excess water can ruin the chemical balance. Additionally, color (measured by APHA) should be near zero (water-white); any yellowish tint indicates impurities or oxidation, which lowers the market value.

Propylene Glycol is hygroscopic, meaning it absorbs moisture from the air. It should be stored in tightly sealed stainless steel, aluminum, or lined carbon steel containers in a cool, dry, well-ventilated area. The standard shelf life is 12 to 24 months when stored correctly. Buyers should avoid prolonged exposure to direct sunlight or high temperatures to prevent oxidation and degradation.

The primary risks include leakage during transit, contamination due to improper tank cleaning, and regulatory non-compliance. To mitigate these, use reputable freight forwarders experienced in liquid chemicals and ensure the supplier provides a Material Safety Data Sheet (MSDS). For large volumes, Flexitanks or ISO Tanks are preferred over drums to reduce the risk of puncture and contamination.

Since PG is a commodity, prices fluctuate with raw material costs (Propylene Oxide) and crude oil prices. Negotiate based on volume tiers (e.g., 20ft FCL vs. LCL) and consider long-term supply contracts to hedge against price volatility. Requesting FOB (Free On Board) terms often allows you to control shipping costs better, but ensure you have a reliable logistics partner for hazardous or sensitive chemical handling.

Always use secure payment methods such as Letters of Credit (L/C) for large orders or Escrow services provided by professional platforms like Made-in-China.com. Conduct third-party pre-shipment inspections (e.g., SGS or BV) to verify the quantity and quality of the liquid before it leaves the factory, ensuring the seal numbers match the shipping documents.

While Propylene Glycol is generally classified as non-hazardous for transport (non-DG), some local customs may require specific HS Code (typically 2905320000) declarations. Check for anti-dumping duties between your country and China. Ensure all packaging complies with International Maritime Dangerous Goods (IMDG) guidelines if applicable, and verify that the labeling is multilingual to meet the destination country's import regulations.