Sodium chloride

Buyers must distinguish between Industrial Grade (96-99% purity) and Food/Pharmaceutical Grade (≥99.5% purity). For industrial use, such as chlor-alkali chemical production or water softening, monitor the moisture content (typically <0.1%) and the presence of impurities like calcium, magnesium, and sulfate ions, which can affect chemical reactions. For food-grade applications, ensure the product meets FCC (Food Chemicals Codex) standards and specify whether anti-caking agents (like Sodium Ferrocyanide) are required or must be excluded for 'clean label' requirements.

Compliance depends on the end-use: ISO 9001 is the baseline for quality management. For food-grade salt, look for HACCP, ISO 22000, or BRC certifications. If the product is intended for the US market, FDA registration is essential; for the EU, ensure compliance with REACH regulations. Pharmaceutical-grade salt must strictly adhere to USP/EP (United States or European Pharmacopoeia) monographs and be produced in GMP-certified facilities.

Sodium Chloride is available in fine vacuum salt, coarse solar salt, or compacted pellets/tablets. Fine salt is ideal for rapid dissolution in food processing, while pellets are preferred for water treatment systems to prevent 'bridging' in brine tanks. From a logistics perspective, bulk shipments (vessel) are cost-effective for industrial grades, whereas 25kg or 50kg PP/PE bags are standard for high-purity grades to prevent moisture absorption and caking during maritime transit.

The biggest risk is moisture damage and caking during long-sea voyages, which can turn a bulk shipment into a solid block. Ensure the supplier uses moisture-proof inner liners and provides a Pre-shipment Inspection (PSI) report from agencies like SGS or Intertek. Additionally, verify the HS Code (typically 2501.00) to avoid customs delays or incorrect duty applications.

Focus on volume-based pricing tiers; Sodium Chloride is a low-margin commodity, so savings are found in scale. Request FOB (Free On Board) pricing to maintain control over freight costs, but ensure the supplier handles export clearance and provides a COA (Certificate of Analysis) for every batch. For long-term contracts, negotiate a price adjustment clause linked to raw material energy costs or shipping index fluctuations.

Use secure payment methods such as Letter of Credit (L/C) at sight for large bulk orders to ensure payment is only released upon presentation of valid shipping documents. For smaller or initial orders, utilizing the secured payment services on Made-in-China.com provides an extra layer of protection, ensuring the supplier meets the agreed-upon quality and lead-time specifications before funds are finalized.