Leading producer of sulfites and thiosulfates

‌Through continuous innovation, we provide high-quality sulfite and thiosulfate products.
Phone+852-84950228E-mailszjzhangjie@dingtalk.com qianhui8023@163.com

We focus on the research and development and production of sulfites and thiosulfates

Contribute to the global green and sustainable development of agriculture and industry

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Provide the nutrients necessary for crops
Adjusting soil pH helps improve alkaline soil

Contribute to global agricultural development

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Deep industry accumulation
 reliable partners

"20+ years dedicated to this" is more than just a number. It means we've weathered multiple market cycles and gained deep insights into the evolution of craftsmanship across industries. We don't just produce products—we deliver premium solutions that exceed expectations, rooted in decades of experience.

Solid production capacity and scale ensure stable supply

With over 200 professionals and an annual delivery capacity exceeding 200,000 tons, we provide the strongest guarantee for your supply chain security. Our robust production team and meticulous planning ensure timely and sufficient product delivery, preventing any production halt due to raw material shortages.

Strict quality control ensures excellent quality

"From raw materials to finished products, 4 strict inspections" is our commitment to your quality. Our professional quality control laboratory strictly monitors key indicators (such as purity, heavy metal content, insoluble matter, etc.) for each batch of products. This ensures that every batch you receive meets specifications, so you can use it with confidence.

A mature global network with services reaching every corner

"Products exported to 15 countries and regions" is the best proof of our international service capability and product competitiveness. No matter where you are, we can provide you with smooth procurement experience and professional product support.

Ammonium thiosulfate

It provides both nitrogen (in ammonium form) and sulfur, two essential secondary nutrients for plants. These elements oxidize in the soil, causing mild acidification and adjusting the pH level to improve alkaline soil. The compound helps dissolve trace elements in the soil, enhancing their availability, and exhibits inhibitory effects against certain soil pathogens.

Ammonium thiosulfate

Calcium thiosulfate

As an efficient source of calcium and sulfur, calcium thiosulfate solution can replace sodium ions adsorbed on soil colloids to improve saline-alkali soils. The thiosulfate ions in calcium thiosulfate reduce plant-absorbable selenite to elemental selenium or other insoluble forms, thereby reducing selenium's bioavailability in soil and its transfer to the food chain. By supplementing calcium to plants before fruit and vegetable maturation, this approach prevents fruit cracking and enhances fruit quality.

Calcium thiosulfate

Ammonium bisulfite

Ammonium bisulfite is a strong reducing agent, which can react with oxygen in the solution or with intermediates such as peroxides generated by drug oxidation, so as to protect the main drug from oxidation.
The sulfonation reaction converts aldehydes into stable, water-soluble sulfonates, which are then removed from the system.

Ammonium bisulfite

Ammonium sulfite

The ammonium sulfite method for producing caramel color, when used as both catalyst and reactant, reduces energy consumption and enhances production efficiency. It also facilitates the formation of polymers, which serve as the primary color-developing agents in E150d caramel color.

Ammonium sulfite

Working With Anpusu

Marketing Model

For global markets, we understand the diverse needs of sulfite and thiosulfate buyers. To meet these needs, we provide customized product services tailored to your specific application scenarios and production scale, ensuring precise alignment with your business requirements.
Understand your needs

A leadership team deeply integrated with strategy, technology and business intelligence

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Provide quality service

A passionate, pragmatic, and innovative group of employees

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Sulfite and thiosulfate producers

ANPUSU

Provide customers with the sulfites and thiosulfates they need
Remove formaldehyde

Ammonium bisulfite utilizes sulfonation to convert aldehydes into stable, water-soluble sulfonates, thereby removing them from the system.

desulfurization and denitrification

In the absorption tower, ammonium sulfite solution is in countercurrent contact with the flue gas to absorb SO₂; ammonium sulfite solution reacts with nitrogen oxide to convert it into harmless nitrogen and useful ammonium sulfate fertilizer

Fertilizers and soil amendments


Ammonium thiosulfate provides both nitrogen and sulfur nutrients. In the soil, it oxidizes and produces a slight acidification effect, adjusting the soil PH value and improving alkaline soil. It helps dissolve trace elements in the soil and improve their effectiveness.

Sulfite and thiosulfate producers

A reliable partner

Catalyze Sustainable Agriculture

Through continuous technological innovation, we provide sulfite and thiosulfate products for agricultural and industrial production, helping agriculture and industry to improve production efficiency, achieve sustainable and more environmentally friendly development goals, and promote the harmonious coexistence between man and nature.

  • 20+

    History of 20+ years

  • 200+

    200+ professional staff

  • 40000+

    Over 4,000㎡ factory floor space

  • 200000+

    More than 200,000 tons of annual capacity

About Anpusu
‌Through continuous innovation, we provide high-quality sulfite and thiosulfate products.
Phone+852-84950228E-mailszjzhangjie@dingtalk.com qianhui8023@163.com
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