Pure dried vacuum salt

Buyers must prioritize chemical purity, typically requiring a Sodium Chloride (NaCl) content of 99.7% to 99.9%. Ensure the moisture content is below 0.1% to prevent caking during storage. For food-grade applications, verify the particle size distribution (standard range is often 250–600 microns) and the presence of Anti-Caking Agents (like Sodium Ferrocyanide/E535), which should be within the regulatory limit of 10-20 mg/kg.

For food-grade salt, suppliers must hold ISO 22000 or HACCP certifications to ensure food safety management. If the salt is intended for the chemical or pharmaceutical industry, BP/USP grade compliance may be necessary. Additionally, ensure the supplier provides a Certificate of Analysis (COA) for every batch and complies with Codex Alimentarius (CXS 150-1985) standards for food-grade salt.

PDV salt is produced using mechanical evaporation under vacuum, which results in a higher purity level and more uniform crystal structure than solar salt. This process removes impurities like magnesium and calcium salts, making it ideal for high-precision industrial applications (e.g., chlor-alkali industry) and food processing where consistent salinity and solubility are critical.

Due to its hygroscopic nature, PDV salt should be packed in moisture-proof PP/PE woven bags (typically 25kg or 50kg) or 1,000kg Jumbo bags (FIBC) with an internal liner. For long-distance sea freight, ensure the use of palletized packaging with shrink wrap to prevent burst bags and moisture ingress during transit.

Implement a pre-shipment inspection (PSI) through third-party agencies like SGS or Intertek. Request a production sample before the bulk run and ensure the contract stipulates that the bulk cargo must match the sample's chemical profile. On platforms like Made-in-China.com, prioritize Audited Suppliers who have undergone on-site verification of their manufacturing facilities.

Salt is a low-value, high-weight commodity, meaning freight costs can exceed the product value. Negotiate on an FOB (Free On Board) basis if you have a reliable freight forwarder, or CIF (Cost, Insurance, and Freight) to simplify logistics. Seek volume-based discounts; typically, orders exceeding 100 metric tons can command a 10-15% price reduction compared to LCL (Less than Container Load) orders.

Utilize Secured Trading Services provided by reputable B2B platforms to ensure payment is only released upon confirmation of shipment. Always use Letter of Credit (L/C) for large-scale industrial contracts to protect against non-delivery. Verify the supplier's export license specifically for food or chemical products to avoid customs delays.

Check for anti-dumping duties or specific import quotas on salt originating from certain regions (e.g., some countries impose tariffs on Chinese salt to protect local mining). Ensure the Harmonized System (HS) Code 2501.00 is correctly declared on all documents to avoid misclassification and potential fines at the port of entry.