Sodium thiosulfate price manufacturers

When sourcing Sodium Thiosulfate, you must distinguish between Industrial Grade (98%+) and Photo/Food Grade (99%+). The price is heavily influenced by the purity level and the physical form (large crystals, small crystals, or anhydrous powder). Ensure the Iron (Fe) content is below 0.001% and Water Insolubles are less than 0.01% for high-end applications like water treatment or photography. Anhydrous Sodium Thiosulfate typically commands a higher price due to its higher concentration and lower shipping weight compared to the pentahydrate form.

Buyers must ensure the product meets specific regional and industry standards. For water treatment, look for NSF/ANSI 60 certification. If used in food processing, it must comply with FCC (Food Chemicals Codex). For export from China, verify that the supplier provides a Material Safety Data Sheet (MSDS) and a Certificate of Analysis (COA) for every batch. REACH compliance is mandatory if you are importing into the European Union.

The price of Sodium Thiosulfate is sensitive to the cost of raw materials like Sodium Carbonate and Sulfur. Additionally, environmental protection policies in China can lead to temporary factory shutdowns, affecting supply and price. To optimize costs, consider bulk purchasing (FCL - Full Container Load) to reduce the per-ton logistics cost, and monitor seasonal demand in the aquaculture industry, which often drives prices up during spring and summer.

The main risks include moisture absorption (caking) during sea transit and purity discrepancies. Sodium Thiosulfate is efflorescent (loses water) in dry air and deliquescent in moist air. Ensure the supplier uses moisture-proof packaging, such as 25kg PP/PE bags with inner liners or 1000kg jumbo bags. Always request a pre-shipment inspection (PSI) by a third party like SGS to verify the chemical composition before the balance payment.

Focus on Tiered Pricing based on volume; for example, ask for a discount if the order exceeds 20 Metric Tons. Inquire about the Lead Time, which should typically be 7-14 days for standard grades. Use the Secured Trading services on Made-in-China.com to protect your payment until the goods are shipped. Negotiate Incoterms clearly—FOB (Free On Board) is standard, but CIF (Cost, Insurance, and Freight) may be more convenient if you lack a dedicated freight forwarder.

Sodium Thiosulfate is generally classified as non-hazardous for transport (Non-DG), which simplifies logistics compared to other chemicals. However, you must ensure the HS Code (2832300000) is correctly declared to avoid customs delays. When shipping to countries with high humidity, specify the use of desiccants inside the container to prevent the crystals from clumping into a solid block, which would render the product difficult to use upon arrival.