Diethyl l-tartrate

When sourcing Diethyl L-tartrate (CAS No. 87-91-2), buyers must prioritize purity levels, typically requiring ≥99% for pharmaceutical or fine chemical applications. Key parameters include optical rotation ([α]D20 +7.5° to +9.0°), which confirms the L-enantiomer's identity, and moisture content (water ≤0.1%) to prevent hydrolysis. Ensure the supplier provides a Certificate of Analysis (COA) for every batch and adheres to ISO 9001 quality management systems.

Diethyl L-tartrate is a critical chiral building block used extensively in asymmetric synthesis, most notably as a ligand in Sharpless epoxidation. It also serves as a high-boiling solvent and a flavoring agent in the food industry. For industrial buyers, it is essential to verify if the grade matches the application, such as Food Grade (FCC) for additives or Reagent Grade for laboratory synthesis.

As a chemical substance, it must be accompanied by a comprehensive Safety Data Sheet (SDS/MSDS) compliant with GHS standards. For the EU market, REACH registration is mandatory if importing over one ton per year. For US imports, ensure the substance is listed on the TSCA inventory. Additionally, check for Kosher or Halal certifications if the product is intended for food or beverage applications.

Diethyl L-tartrate is sensitive to moisture and heat. It should be stored in cool, dry, and well-ventilated areas, away from strong oxidizing agents. Standard packaging includes 200kg plastic or iron drums, or 1000kg IBC tanks for large-scale operations. Ensure the supplier uses nitrogen blanketing during packaging to prevent oxidation and maintain long-term stability.

Utilize Trade Assurance services provided by reputable platforms like Made-in-China.com to protect your payment until delivery is confirmed. Always conduct a third-party factory audit (such as SGS or Intertek) to verify the supplier's production capacity and environmental compliance before placing a high-value order.

While not typically classified as a highly dangerous good for transport, it is vital to confirm the UN Number and Hazard Class with the manufacturer. Ensure the freight forwarder is experienced in chemical logistics and provides proper labeling and palletization to prevent leakage or contamination during sea freight.

Chemical prices are often tied to raw material costs (like Tartaric Acid and Ethanol). Negotiate based on volume-based pricing tiers, where discounts of 10-20% are common for FCL (Full Container Load) orders. Request Incoterms 2020: CIF or DAP to simplify the logistics process if you do not have a dedicated local customs broker.

Look for the 'Audited Supplier' badge on Made-in-China.com, which indicates the supplier has undergone rigorous on-site verification. Review their export history and buyer feedback specifically for organic esters to ensure they have a proven track record in the fine chemical sector.