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Shandong Pulisi Chemical Co., Ltd. was established in 2006 (Stock Code: 307785). The company focuses on petrochemicals, mining chemicals, feed chemicals, and pharmaceutical chemicals. At present, the company has established long-term and stable partnerships with Fortune Global 500 companies such as China National Petroleum Corporation and Saint-Gobain. We always take customer demand as the core orientation and provide tailored solutions to help customers strengthen their market competitiveness.
The company has passed ISO9001:2015 Quality Management System Certification and German BV Certification, and has been awarded multiple honors such as Foreign-Oriented Economic Enterprise, Alibaba Demonstration Base, and Contribution Enterprise. In 2023, the company successfully went public with stock code: 307785.
Meanwhile, the company has established mature warehousing and distribution systems at key logistics hubs, including Qingdao Port, Tianjin Port, and Xinjiang border ports (Alashankou, Khorgos). We are able to provide flexible supply solutions according to customer needs to ensure timely order delivery. No matter where customers are located, Shandong Pulisi Chemical will safeguard their business development with professional service systems and efficient response capabilities.
Sodium Sulfide is an inorganic chemical compound with the chemical formula Na₂S. In its anhydrous state, it adopts an antifluorite crystal structure. This configuration comprises a face-centered cubic (FCC) lattice array of sulfur anions (S²⁻) where the sodium cations (Na⁺) occupy all the tetrahedral coordination sites. The electrostatic attraction between these oppositely charged ions is the foundation of its ionic behavior.
When dissolved in water, the crystal lattice of Na₂S breaks down entirely, liberating hydrated sodium cations and highly basic sulfide anions. The dissociation reaction is represented as:
Na₂S (s) → 2Na⁺ (aq) + S²⁻ (aq)
The sulfide ion undergoes immediate and extensive hydrolysis, generating hydrosulfide (HS⁻) and hydroxide (OH⁻) ions, resulting in a highly alkaline solution.
Common commercial grades of Sodium Sulfide are solid hydrates, typically containing around 60% Na₂S by weight. This corresponds to the nonahydrate form (Na₂S · 9H₂O) or the pentahydrate intermediate. The presence of crystal water is critical as it influences the melting point (approx 920°C for anhydrous vs 50°C for nonahydrate) and thermodynamic stability during transport.
In international trade, obtaining the CE Certification is a major indicator of compliance with safety, health, and environmental protection standards within the European Economic Area (EEA). For chemicals like Sodium Sulfide, CE compliance signifies that the production pathways, heavy metal content (particularly iron impurities, typically kept under 10 ppm to 1500 ppm depending on application), and packaging align with stringent REACH regulations and CLP classification standards.
CE-certified manufacturers must implement rigorous Quality Management Systems (such as ISO 9001:2015) to guarantee batch consistency. Purity control is essential: low-iron sodium sulfide is particularly sought after in the cosmetics, leather, and paper pulp industries to prevent discoloration issues caused by iron complexes.
China stands as the global epicentre for industrial chemical synthesis, and Shandong Province represents the core of this production capacity. Buying direct from advanced Chinese manufacturing plants like Shandong Pulisi Chemical Co., Ltd. offers global procurement offices several key advantages:
Proximity to rich reserves of sodium sulfate (Glauber's salt) and high-quality coal allows Chinese plants to employ cost-effective reduction methods, maintaining a highly competitive pricing structure globally.
We operate large-scale warehousing networks at major shipping points like Qingdao Port and Tianjin Port, as well as land crossing gates like Alashankou and Khorgos. This allows us to dispatch maritime containers or trans-Eurasian trains within days of order finalization.
By integrating automated evaporation and flaking technologies, we ensure uniform flake thickness, minimized dust emission during bag filling, and airtight nitrogen padding to prevent oxidation during sea freight.
The global chemical sector is shifting toward carbon reduction. Traditionally, Sodium Sulfide is produced via the carbothermic reduction of sodium sulfate:
Na₂SO₄ + 2C → Na₂S + 2CO₂
Modern Chinese chemical plants are investing in energy recovery systems, carbon capture technology, and alternative catalytic synthetic routes (such as direct reaction of hydrogen sulfide gas with caustic soda) to reduce the carbon footprint per ton of output. This helps international buyers meet their Scope 3 emission targets.
Sodium Sulfide is a versatile reagent with major applications across several heavy industries. Below is a detailed breakdown of how our products serve these sectors globally:
Acts as a key sulfidizing agent for oxide ores (such as copper oxide, zinc oxide, and lead oxide). It modifies the mineral surface chemistry, enabling high-yield adsorption of xanthate collectors.
Used in beamhouse leather processing as a depilatory (unhairing agent). The hydrosulfide ions cleave the disulfide linkages in keratin, facilitating clean hair removal from animal hides.
An effective agent for precipitating heavy metals. In alkaline environments, sulfide ions react with Cu²⁺, Pb²⁺, and Cd²⁺ to form highly insoluble metal sulfide precipitates that are easily filtered.
Used in the synthesis and application of sulfur dyes. It reduces insoluble sulfur dyes into soluble leuco compounds, which can then be applied to cellulosic fibers.
In modern infrastructure, Sodium Sulfide helps prevent acid mine drainage by precipitating sulfide minerals in controlled environments. In the pulp and paper industry (Kraft process), it acts as an active cooking chemical to dissolve lignin, facilitating the production of high-strength paper fibers.
Exporting to more than 100 countries and regions with reliable container-freight logistics.
More than 20+ years of export experience, maintaining cooperative relations with more than 1,000 global companies.
ISO Certification, SGS certification, K-REACH Registration support, and FAMI-QS Certification for animal feed products.
We always provide reasonable prices based on customization, target specifications, and design requirements.
Large-scale port warehouses located near major shipping routes to guarantee fast dispatch and secure handling.
An efficient and professional sales team offers high-response after-sales and chemical compliance consultation.
Since our founding in 2006, Shandong Pulisi Chemical has committed to being a reliable industrial and mining raw materials supplier. We regularly participate in international chemical trade fairs to stay connected with global developments and partners.
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