sodium sulfide price

The price is primarily driven by the purity level (typically 60% min for industrial grade) and the Iron (Fe) content. Low-iron sodium sulfide (yellow flakes), with iron content below 10-30ppm, commands a higher price than standard red flakes (1500ppm iron). Additionally, the physical form—flakes, solid, or fused—and the water-insoluble matter percentage are critical benchmarks for quality and pricing.

Usage scenarios dictate the necessary grade: In the leather industry, it is used for dehairing and requires stable alkalinity; in the mining industry (ore flotation), consistent concentration is key. For the textile and dye industry, low-iron grades are mandatory to prevent staining. Buyers must ensure the product meets GB/T 10500-2009 (Chinese National Standard) or equivalent international standards to ensure chemical reactivity and safety.

Sodium Sulfide is classified as a Class 8 Corrosive Substance (UN 1849). Suppliers must provide a valid Material Safety Data Sheet (MSDS) and a Certificate of Analysis (COA) for every batch. For international trade, ensure the supplier has a License for the Export of Precursor Chemicals (if applicable) and adheres to IMDG (International Maritime Dangerous Goods) packaging standards to prevent moisture absorption and spontaneous combustion.

To maximize value, buyers should focus on bulk procurement (FCL - Full Container Loads), as shipping costs for hazardous chemicals are high. Negotiating tiered pricing based on annual volume can reduce unit costs by 5-10%. It is also advisable to monitor the price of raw materials like sodium sulfate and coal/carbon, which are the primary cost drivers in the production of Sodium Sulfide.

The biggest risks include quality degradation due to moisture (deliquescence) and regulatory seizure. Sodium Sulfide is highly hygroscopic; if packaging is not hermetically sealed (usually 25kg plastic woven bags with PE liners), the purity will drop. Always use third-party inspection services like SGS or BV at the loading port to verify the actual purity vs. the COA before final payment.

Focus on long-term supply stability rather than just the lowest price. Ask for free samples (500g-1kg) for lab testing before placing a bulk order. Inquire about the production process (Absorption method vs. Reduction method) as this affects the impurity profile. On platforms like Made-in-China.com, prioritize Audited Suppliers who have verified production capacities and environmental discharge permits.

Since it is a dangerous good (DG), you must use a freight forwarder experienced in handling Class 8 chemicals. Ensure the supplier provides UN-approved packaging. For shipping to specific regions, check for anti-dumping duties; for example, some countries impose extra tariffs on Chinese chemicals, so verify the HS Code (28301010) with your local customs broker to calculate the Total Landed Cost.

Utilize Secure Payment services provided by reputable B2B platforms like Made-in-China.com to protect your funds until the shipping documents are verified. Avoid 100% upfront payments; a standard industry practice is 30% T/T deposit and 70% against the Bill of Lading (B/L) copy, or using an Irrevocable Letter of Credit (L/C) for large-scale industrial contracts.