Barium carbonate

Buyers must prioritize the purity level, typically categorized into Industrial Grade (≥99.2%) and Electronic Grade (≥99.9%). Key impurities to monitor include Total Sulfur (SO4), Iron (Fe), and Chlorides (Cl), as these significantly impact the refractive index in glass manufacturing and the dielectric properties in ceramics. Additionally, specify the particle size distribution (mesh size); for instance, fine powder is preferred for chemical reactions, while granular forms are better for reducing dust in glass furnaces.

As Barium Carbonate is classified as a toxic substance (UN Number 1564, Class 6.1), suppliers must provide a valid Material Safety Data Sheet (MSDS) compliant with GHS standards. For European markets, REACH registration is essential. Ensure the product meets ISO 9001:2015 for quality management and check for COA (Certificate of Analysis) for every batch to verify chemical consistency.

In the Ceramics and Brick industry, Barium Carbonate is used to prevent 'scumming' by precipitating soluble sulfates; here, standard industrial grade is sufficient. However, for Optical Glass or PTC Thermistors, you must source High-Purity/Electronic Grade to ensure transparency and electrical stability. For Oil Drilling, the focus shifts to bulk density and solubility in specific acid environments.

Barium Carbonate is a Hazardous Material (HazMat). You must ensure the supplier uses UN-approved packaging, typically 25kg or 1000kg moisture-proof PP woven bags with PE liners. During sea freight, it must be stored in a cool, ventilated area away from acids and food supplies. Always verify if your local port has the license to handle Class 6.1 chemicals before finalizing the shipment.

Utilize Made-in-China.com's Secured Trading services to protect your payment. Before placing a bulk order, request a pre-shipment inspection (PSI) by third-party agencies like SGS or Intertek to verify the chemical composition. Avoid suppliers who cannot provide a Production License for Hazardous Chemicals, as this indicates a lack of legal manufacturing standing.

Given that Barium Carbonate prices are sensitive to raw material (Barite) costs and environmental regulations in China, consider formula-based pricing or annual volume contracts to lock in stable rates. Negotiate for tiered pricing where a 5-10% discount is applied when moving from FCL (Full Container Load) to multi-container monthly shipments.