Barite

The most critical factor is the Specific Gravity (SG). For the oil and gas drilling industry, a minimum SG of 4.20 g/cm³ is standard to meet API 13A requirements. For the paint and coatings industry, focus on whiteness (typically >90%) and particle size distribution (D50/D97). For chemical applications, the Barium Sulfate (BaSO4) content should ideally be above 90-95%, with minimal impurities like iron oxide or silica.

Ensure the supplier provides a Certificate of Analysis (COA) for every batch. For drilling grade, look for API (American Petroleum Institute) certification. For industrial use, verify ISO 9001:2015 manufacturing standards. It is highly recommended to engage third-party inspection services like SGS or Intertek to perform pre-shipment testing on density, moisture content, and heavy metal impurities.

Barite is primarily used as a weighting agent in drilling muds to prevent blowouts by suppressing high formation pressures. In the automotive and construction sectors, it serves as a functional filler in plastics and rubbers to increase density and chemical resistance. In the medical field, high-purity barite is used for X-ray shielding and as a contrast agent.

Particle size determines the dispersion and sedimentation rates. In drilling, a 200-mesh or 325-mesh powder is standard. In the plastics and paint industries, ultrafine or precipitated barite (sub-micron levels) is required to ensure a smooth surface finish and to prevent the clogging of application equipment.

Barite is a high-density, heavy cargo, which means shipping costs are heavily influenced by weight rather than volume. When sourcing from Made-in-China.com, clarify if the price is FOB (Free on Board) or CIF (Cost, Insurance, and Freight). Ensure the supplier uses heavy-duty Jumbo Bags (1.5 MT capacity) with UV protection if the material will be stored outdoors at the destination port.

Utilize Secured Trading Services offered by Made-in-China.com to ensure payment is only released upon confirmation of shipment. Always request a small sample (1-5kg) for lab testing before placing a bulk order. For large contracts, consider using a Letter of Credit (L/C) to protect against non-delivery or sub-standard quality.

Check for export duties or environmental taxes imposed by the origin country, as mineral mining is strictly regulated. Ensure the supplier complies with REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) if you are importing into the European Union, and verify that the mining source adheres to local environmental protection laws to avoid supply chain disruptions.

Price is often tied to the purity and specific gravity. Negotiate based on volume tiers; for example, ordering in full vessel loads or 20ft container multiples can significantly reduce the per-ton price. Ask for a breakdown of the cost, including processing, packaging, and inland trucking to the port, to identify potential savings.