Sodium hydrosulfide price manufacturers

When sourcing Sodium Hydrosulfide, the price is primarily driven by the purity level (typically 70%, 85%, or 90% for solid flakes) and the impurity profile. You must verify the Iron (Fe) content, as high-grade NaHS for mining or leather tanning usually requires Fe < 10ppm or < 30ppm to prevent product discoloration. Additionally, confirm the Sodium Carbonate (Na2CO3) and Sodium Sulfide (Na2S) levels, as these affect the chemical reactivity and overall cost-effectiveness of the reagent.

Sodium Hydrosulfide is available in yellow flakes (solid) and liquid solution (typically 30-45%). While liquid NaHS may have a lower unit price per ton of solution, it incurs higher shipping costs due to the weight of the water and requires specialized chemical tankers or IBC tanks. Solid flakes offer higher concentration and easier long-term storage, but require dissolution equipment on-site. Buyers should calculate the landed cost per active unit of NaHS rather than just the price per gross ton.

As a hazardous chemical (UN 2949 for hydrates, UN 2318 for anhydrous), suppliers must provide a valid Material Safety Data Sheet (MSDS/SDS) compliant with GHS standards. Ensure the manufacturer holds an ISO 9001:2015 certification for quality management and, crucially, a Production License for Hazardous Chemicals. For international trade, the product must be packed in UN-approved packaging (such as 25kg PP bags with PE liners or 1000kg jumbo bags) to ensure maritime safety and customs clearance.

The application dictates the price-to-quality ratio. In Mining (Flotation), a standard industrial grade is often sufficient. However, in the Leather Tanning industry, low-iron grades are essential to avoid staining hides. In the Paper & Pulp industry (Kraft process), the focus is on the sulfidity balance. For Textile and Dyeing, high-purity flakes are preferred to ensure consistent color yields. Always specify your end-use application to the supplier to avoid paying for unnecessary purity or receiving sub-par material.

The biggest risks are chemical degradation (oxidation) and logistical delays. Sodium Hydrosulfide is hygroscopic and reacts with oxygen; ensure the supplier uses vacuum-sealed or double-layered moisture-proof packaging. To mitigate financial risk, use Trade Assurance or Letters of Credit (L/C). For quality assurance, mandate a pre-shipment inspection by a third party like SGS or Intertek to verify the NaHS content and iron levels before the balance payment is made.

Negotiation should focus on volume commitments and contract duration. Since NaHS prices fluctuate with raw material costs (Sodium Hydroxide and Hydrogen Sulfide), signing a long-term supply framework can lock in better rates. Mentioning that you are sourcing via Made-in-China.com can also signal to suppliers that you are a professional buyer comparing multiple verified factories, encouraging them to offer more competitive 'factory-direct' pricing.

NaHS is classified as a Class 8 Corrosive substance. You must ensure the freight forwarder is experienced in Dangerous Goods (DG) handling. The supplier must provide a 'Dangerous Goods Transport Package Usage Appraisal Report'. When shipping to specific regions, be aware of port restrictions on hazardous materials; for example, some ports require immediate 'ship-to-truck' transfer, which can increase local handling fees. Always confirm the IMO Class and UN Number with your logistics provider early in the process.

Check the supplier's profile on Made-in-China.com for the 'Audited Supplier' badge. Review their Business License to ensure their scope includes 'Chemical Production' and not just 'Trading'. Request a factory video tour or a live inspection of their hazardous waste treatment facilities, as environmental compliance is a major factor in the stability of Chinese chemical production. A supplier with a stable environmental record is less likely to face sudden government-mandated shutdowns.