Triethylene glycol

Triethylene Glycol (TEG) is a transparent, odorless liquid widely used in the oil and gas industry for natural gas dehydration due to its high hygroscopicity. It also serves as a chemical intermediate in the production of plasticizers, polyester resins, and polyurethanes. In consumer goods, it is utilized as a solvent in printing inks and as a de-icing fluid for aircraft and runways.

Buyers should demand a purity level of ≥99.5% for high-end industrial applications. Key technical parameters include a maximum water content of 0.1%, a color rating of ≤25 Pt-Co (Hazen), and a specific gravity between 1.124 and 1.126 at 20°C. For gas dehydration, ensuring low acidity (calculated as acetic acid) is critical to prevent equipment corrosion.

Suppliers must provide a Material Safety Data Sheet (MSDS/SDS) compliant with GHS standards. For international trade, ensure the product meets REACH registration (for EU markets) and TSCA requirements (for US markets). If used in food-contact materials or cosmetics, it must adhere to FDA or local health authority regulations regarding residual impurities.

Request a Certificate of Analysis (COA) for every batch. It is highly recommended to engage third-party inspection services like SGS or Intertek to perform Gas Chromatography (GC) testing to verify the glycol composition and detect potential contaminants like diethylene glycol or heavy metals.

The primary risks include product degradation during transit and regulatory non-compliance. To mitigate these, ensure the supplier uses ISO tanks or IBC drums that are properly sealed and labeled. Always verify the supplier's Export License for Hazardous Chemicals (if applicable) and use secure payment methods like Letters of Credit (L/C) or trade assurance services provided by platforms like Made-in-China.com.

Focus on volume-based pricing tiers; typically, purchasing in full container loads (FCL) can reduce unit costs by 15-20%. Negotiate for long-term supply contracts to hedge against the volatility of raw material prices (ethylene oxide). Ask for flexible lead times and clarify who bears the cost of demurrage and detention at the port of discharge.

TEG is generally classified as non-hazardous for transport (non-DG), but it is sensitive to moisture. Ensure the shipping documents clearly state 'Keep Dry' and 'Store in a Cool Place'. For international shipping, FOB (Free On Board) is often preferred by experienced buyers to maintain control over freight costs and insurance, though CIF (Cost, Insurance, and Freight) may be easier for first-time buyers.

Conduct a thorough factory audit or request a video inspection of the production line. Prioritize Audited Suppliers on Made-in-China.com, as these entities have undergone verification of their business license, production capacity, and quality management systems. Always cross-reference the bank account details provided on the invoice with the company's registered name to avoid phishing scams.