tellurium powder

When sourcing Tellurium Powder, the most critical factor is purity, typically ranging from 99.9% (3N) to 99.999% (5N). Buyers must also specify the particle size (mesh size), such as -200 mesh or -325 mesh, as this affects the solubility and reaction rate in applications like thermoelectric materials, metallurgy, and solar cell production. Ensure the supplier provides a COA (Certificate of Analysis) for every batch to verify impurity levels of elements like Selenium, Copper, and Iron.

Tellurium Powder is primarily used as an alloying agent in steel and copper to improve machinability. In the high-tech sector, it is a vital component in Cadmium Telluride (CdTe) thin-film solar panels and thermoelectric cooling devices. It also serves as a vulcanizing agent in the rubber industry and a primary ingredient in specialty glasses and infrared optical materials.

As a chemical product, Tellurium Powder must be accompanied by a Material Safety Data Sheet (MSDS) or SDS. It is often classified under UN3288 (Toxic solid, inorganic) for transport. Ensure the supplier complies with REACH regulations for European markets and TSCA for the US. Packaging must be vacuum-sealed in plastic bags or glass bottles inside sturdy drums to prevent oxidation and moisture absorption.

Prioritize suppliers with ISO 9001 certification and those who can provide ICP-MS (Inductively Coupled Plasma Mass Spectrometry) testing results. For long-term partnerships, request a small sample (100g-500g) to conduct a pilot run. On Made-in-China.com, look for Audited Suppliers who have undergone third-party on-site inspections to verify their production capacity and laboratory equipment.

The primary risks include purity fraud, where lower-grade material is substituted for high-purity powder, and oxidation during transit if packaging is compromised. To mitigate this, use secure payment terms like Escrow or Letter of Credit (L/C) and insist on pre-shipment inspection (PSI) by agencies like SGS or Intertek to verify weight and purity before the balance is paid.

Tellurium Powder requires Class 6.1 Dangerous Goods (DG) packaging and handling. You must work with a freight forwarder experienced in hazardous chemicals. Ensure the supplier provides the Dangerous Goods Declaration and that the shipping marks are clearly visible. For air freight, strict IATA regulations apply; for sea freight, ensure the container is kept in a cool, dry, and well-ventilated area.

Tellurium is a minor metal, and its price is influenced by global supply (often a byproduct of copper refining). Monitor market price indexes before negotiating. Offer to sign a long-term supply agreement (MOU) to secure stable pricing against market volatility. On Made-in-China.com, comparing quotes from at least 3-5 verified manufacturers will give you the leverage to negotiate better volume discounts (typically 5-10% for bulk).

Check the HS Code (typically 2811.29) for specific import duties in your country. Be aware of export licenses required by the country of origin, as Tellurium is sometimes flagged under dual-use goods regulations due to its applications in electronics and sensors. Ensure all Customs Invoices and Packing Lists accurately reflect the chemical composition to avoid clearance delays.