Sodium Sulfide (Na2S) in its 60% yellow flakes composition represents the industry benchmark for applications requiring minimal iron contamination. The characteristic yellow hue is a primary visual indicator of low-iron presence, distinguishing it from standard red flakes which carry significantly higher iron oxides. By keeping the iron content strictly under 30 ppm, and in premium grades below 10 ppm, this material prevents unwanted discoloration in leather production and eliminates interference during mineral flotation processes.
Our production relies on advanced crystallization technology that regulates the hydration states, yielding highly stable flakes. The molecular weight of the anhydrous chemical is 78.04 g/mol, while our yellow flakes stabilize around the pentahydrate and nonahydrate phases to guarantee rapid solubility at standard working temperatures. These controlled configurations ensure that handlers experience minimal dust generation, improving warehouse safety and process consistency.
The industrial applicability of Sodium Sulfide 60% Yellow Flakes spans multiple crucial sectors:
Within metallurgical extraction, Na2S acts as a highly potent sulfidizing agent. It pre-treats oxidized ores of non-ferrous metals (like copper, lead, and zinc), creating a sulfide surface layer that selectively interacts with xanthate collectors. This increases recovery rates of precious metals in flotation circuits while suppressing iron sulfides when required.
In the beamhouse stage of leather processing, our yellow flakes act as an efficient dehairing agent. The sulfide ions split the disulfide cross-links of keratin in the animal hides, cleanly removing hair without structural degradation of the underlying collagen matrix. Low iron levels guarantee no blue-black staining on high-end leather hides.
In textile operations, it serves as a reducing agent for insoluble sulfur dyes. It converts the pigments into soluble leuco compounds, allowing them to penetrate and bond with cotton fibers before atmospheric oxidation locks the vibrant shades into the fabric.
Na2S is a highly reliable heavy metal precipitant. When introduced to industrial wastewater, sulfide ions react with dissolved copper, mercury, cadmium, and lead ions, forming insoluble metal sulfide precipitates. These precipitates feature lower solubility constants than hydroxide alternatives, ensuring superior heavy metal removal across wide pH ranges.
Shandong Pulisi Chemical Co., Ltd. (Stock Code: 307785), established in 2006, operates at the forefront of China's chemical manufacturing transformation. By incorporating Factory 4.0 paradigms, our production lines utilize closed-loop digital automation to control temperature, crystallization speeds, and flake thickness. This rigorous control guarantees consistent chemical metrics from batch to batch, minimizing impurities and optimizing handling parameters.
Our supply chain resilience is rooted in our domestic infrastructure. Our mature warehousing and distribution hubs are strategically positioned at main national logistics junctions, including Qingdao Port, Tianjin Port, and major northwestern border crossings like Alashankou and Khorgos. This dual maritime-overland logistics framework secures seamless global delivery routes, insulating buyers against regional disruptions and reducing port transit times.
To operate reliably in international markets, Shandong Pulisi has secured a suite of certifications that reflect our commitment to product safety, environmental stewardship, and ethical supply chains. Our facilities conform to ISO 9001:2015 for Quality Management, while our products have undergone rigorous third-party evaluations by Bureau Veritas (BV) and SGS.
Furthermore, our materials meet global chemical registration protocols such as REACH and K-REACH, ensuring friction-free imports to Europe and South Korea. For adjacent sectors such as feed additives, we maintain FAMI-QS compliance, alongside Kosher and Halal verifications, proving our chemical processes observe strict hygiene and raw material traceability standards.
Textile, Printing, Dyeing & Leather
Agricultural Chemicals, Food & Feed Additives
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Demonstrated capabilities supplying clients across more than 100 countries and regions with zero compliance failures.
Over 20 years of export experience, building partnerships with 1,000+ businesses worldwide.
Dual ISO and BV certified manufacturing lines, with products systematically audited and certified by SGS, K-REACH, and FAMI-QS.
Optimized production methods ensure stable, competitive pricing aligned with custom design parameters.
Large-scale warehouse facilities near major ports enable rapid logistics response times and safe transport of hazardous materials.
Dedicated sales engineers provide rapid pre-sales analysis and after-sales support, working to resolve inquiries within hours.
Pulisi
