Magnesium chloride

Buyers must prioritize the purity level (typically 46%-47% for hexahydrate) and the chemical form (Anhydrous vs. Hexahydrate). For industrial applications like de-icing or dust control, Magnesium Chloride Flakes or Pellets are standard. However, for food or pharmaceutical grades, you must ensure heavy metal content (Lead, Arsenic, Mercury) is within strictly defined limits, usually measured in parts per million (ppm).

Depending on the end-use, you should verify ISO 9001 for general quality management. For food-grade applications, FCC (Food Chemicals Codex) or E511 compliance is required. If exporting to the EU, REACH registration is essential. For hazardous material handling (though MgCl2 is generally stable), always request a current MSDS (Material Safety Data Sheet) to ensure safe storage and transport.

Magnesium Chloride is highly hygroscopic and exothermic (releases heat when dissolving). You should request a solubility test report to confirm it dissolves completely without leaving sediment, which is critical for liquid brine applications. For industrial use, check the alkali metal chloride content (like NaCl or KCl) to ensure it meets your specific chemical process requirements.

The Industrial Grade is widely used for road de-icing, dust suppression, and textile fireproofing. The Food/Pharma Grade is used as a coagulant for Tofu (Nigari), a mineral supplement, or in dialysis fluids. The Technical Grade is often utilized in the construction industry for Sorel cement (magnesium oxychloride cement) and in aquariums to maintain magnesium levels for coral growth.

The biggest risk is moisture absorption. Magnesium Chloride is extremely deliquescent; if the packaging is breached, the product will turn into liquid. Ensure the supplier uses moisture-proof PP/PE woven bags with an inner plastic liner, and consider container desiccant poles for long-distance sea freight. Always specify palletized loading with shrink-wrap to prevent bag breakage during transit.

Prices for Magnesium Chloride are often tied to raw material costs (magnesite mining) and energy prices. For bulk orders (e.g., >20 tons), negotiate for FOB or CIF terms to lock in total costs. On platforms like Made-in-China.com, look for 'Diamond Members' or 'Audited Suppliers' who offer tiered pricing—discounts of 5-10% are common when moving from LCL (Less than Container Load) to FCL (Full Container Load) volumes.

To mitigate risk, use Secure Payment services provided by reputable platforms like Made-in-China.com. Never wire full payments to private accounts. Utilize Third-Party Inspection services (such as SGS or BV) to conduct a Pre-Shipment Inspection (PSI) to verify the chemical composition and weight before the final balance is paid.

Check the HS Code (typically 282731) against your country's tariff schedule. Be aware of anti-dumping duties that some regions (like the US or EU) may impose on specific chemical imports from China. Ensure the Certificate of Origin (CO) is provided to take advantage of any existing Free Trade Agreements (FTAs) that might reduce import duties.