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Sodium Sulfite Anhydrous (CAS Number: 7757-83-7) is a key inorganic chemical compound widely utilized across major processing industries. Structurally, it is the soluble sodium salt of sulfurous acid. Exhibiting excellent reducing, bleaching, and dechlorinating properties, this compound acts as a stabilizing agent and oxygen scavenger. Industrially, the anhydrous form is highly sought after over its heptahydrate counterpart due to its higher stability, elevated active content, and resistance to environmental degradation during long-distance transportation.
As a leading China Sodium Sulfite Anhydrous Manufacturer, Shandong Pulisi Chemical Co., Ltd. supplies high-purity grades that meet stringent industrial specifications. The production process leverages sophisticated chemical reactions combining sulfur dioxide (SO₂) with sodium carbonate (Soda Ash) under tightly controlled temperatures. This guarantees high assay percentages, optimal bulk density, and minimal heavy metal contaminants, making it suitable for applications spanning water treatment, mineral processing, and photographic developer formulation.
The global market for Sodium Sulfite Anhydrous is expanding, driven by growing water purification standards and expanding metallurgical processing requirements in developing economies. According to industrial intelligence reports, the demand for high-efficiency oxygen scavengers in high-pressure boilers has pushed Sodium Sulfite to the forefront of municipal and industrial water treatment technologies.
Geographically, East Asia, led by China, remains the primary production hub, while consumption is distributed globally across North America, the European Union, and rapidly developing manufacturing zones in Latin America and Southeast Asia. Regulatory frameworks, such as EU REACH and K-REACH, have placed tighter compliance requirements on chemical importing companies. This has shifted global procurement patterns towards verified, certified manufacturers capable of offering trace metal analyses and strict environmental compliance certificates.
China's prominence as the premier sourcing destination for Sodium Sulfite Anhydrous is sustained by several structural advantages:
Sodium Sulfite Anhydrous functions as a key reagent in multiple vertical markets:
In high-pressure steam boilers, dissolved oxygen leads to catastrophic metal pitting and pipe oxidation. Sodium Sulfite acts as an oxygen scavenger, reacting with dissolved O₂ to form benign Sodium Sulfate (Na₂SO₄), prolonging equipment service life and reducing maintenance costs.
In the paper industry, Na₂SO₃ acts as a bleaching agent in the semi-chemical pulping process (NSSC). It aids in lignin removal, improving the brightness and structural integrity of the paper fibers without degrading the cellulose backbone.
In flotation circuits processing polymetallic ores (such as lead, zinc, and copper), Sodium Sulfite serves as a selective depressant for zinc and iron sulfides, ensuring high-purity concentrates during processing.
It acts as a preservative in developer solutions, preventing the rapid oxidation of active agents like hydroquinone and securing archival image development.
Established in 2006, we have grown into a cornerstone chemical enterprise, listing under Stock Code 307785 in 2023.
Shandong Pulisi Chemical Co., Ltd. has established long-term and stable partnerships with Fortune Global 500 companies such as China National Petroleum Corporation (CNPC) and Saint-Gobain. We prioritize customer demand, offering custom chemical formulations and packaging solutions to strengthen your market position.
Our operations conform to strict global standards, ensuring compliance and peace of mind for international buyers.
We actively participate in international chemical trade fairs and technical symposia, strengthening relationships with global partners.
Since our establishment in 2006, Shandong Pulisi Chemical Co., Ltd. has adhered to the core philosophy of serving as a reliable industrial and chemical raw material supplier. We focus on the development of quality chemical industries, combining continuous R&D, supply chain optimization, and strict environmental standards to remain competitive globally.
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Our chemicals serve as foundational raw materials across diverse industrial applications globally.
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We export to more than 100 countries and regions worldwide, meeting diverse trade and regulatory standards.
With over 20 years of export experience, we maintain partnerships with more than 1,000 global companies.
Our operations are backed by ISO 9001, SGS, K-REACH, and FAMI-QS certifications for chemical purity and trace safety.
We offer competitive pricing structures adjusted to chemical specifications, batch sizes, and logistics requirements.
We operate dedicated storage hubs at Qingdao Port, Tianjin Port, and Xinjiang border railheads for rapid dispatch.
Our engineering and sales team provides comprehensive support from initial testing to post-delivery feedback.
We work closely with global industry leaders, helping secure robust supply chains and high-quality processing chemicals.
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