从China供应商批量进口2, 5-Dimercapto-1, 3, 4-Thiodiazole Dmtd
Sourcing DMTD from Hangzhou Bais Chemical Technology Co., Ltd - China Import Guide
Before placing an order for DMTD from Hangzhou Bais Chemical Technology, request a current certificate of analysis confirming the 98% purity, CAS number 1072-71-5, and any relevant impurity limits. For lubricant additive applications, ask whether the supplier can provide data on sulfur content, ash residue, and particle size distribution, as these parameters affect dispersibility and performance in finished formulations. If you are sourcing for pharmaceutical use, insist on additional documentation such as residual solvent analysis and heavy metals testing.
For logistics, clarify whether the shipment will depart from Ningbo or Shanghai port, the typical production lead time after order confirmation, and the minimum order quantity that justifies a full container load versus LCL shipment. Chinese chemical exporters generally require a 30% advance payment with the balance against copy of bill of lading, though terms vary by supplier relationship. Ensure that the commercial invoice, packing list, and certificate of origin are prepared accurately to avoid delays at customs clearance in your destination country.
On receipt of the DMTD shipment, conduct incoming quality checks including visual inspection of the powder for clumping or discolouration, verification of batch numbers against the certificate of analysis, and, if feasible, an independent assay using iodometric titration or HPLC to confirm purity claims. Store the material in sealed containers in a dry warehouse at ambient temperature, and rotate stock to use older batches first. If the product is destined for formulation into lubricants, run a small-scale blending trial before committing to large-volume production to confirm compatibility with your base oil and additive package.
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