Global Sodium Thiosulfate Market Size, Share Analysis Report By Purity (0.99, 0.05, 0.05), By Grade (Technical Grade, Pharmaceutical Grade, Food Grade), By Form (Crystals, Powder, Solution), By Application (Water Treatment, Textile Processing, Photography, Food Additives, Others) , By Region and Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2026-2035

Report Overview

The Global Sodium Thiosulfate Market size is expected to be worth around USD 210.2 Million by 2035, from USD 120.2 Million in 2025, growing at a CAGR of 5.8% during the forecast period from 2026 to 2035. In 2025, Asia-Pacific held a dominant market position, capturing more than a 45.3% share, holding USD 54.3 Million revenue.

Sodium thiosulfate is positioned as a specialty inorganic chemical serving water dechlorination, mining, medical antidote and industrial processing uses. Its demand base is supported by regulated water testing, where EPA-linked guidance cites 6.7 mg/L anhydrous sodium thiosulfate to reduce 1.0 mg/L chlorine, reinforcing its role in wastewater and drinking-water workflows.

The industrial scenario remains linked to water and wastewater investment. WHO/UNICEF reported in 2025 that 2.1 billion people still lacked safely managed drinking water, while UNICEF reported 1.2 billion people gained safely managed sanitation between 2015 and 2024, lifting coverage from 48% to 58%. These gaps support continued chemical demand in treatment, testing and neutralization processes. World Gold Council data show 2025 gold mine production at about 3,672 tonnes, while global gold demand reached 5,002 tonnes, creating continued interest in leaching, detoxification and alternative processing reagents.

Growth drivers include water-infrastructure renewal and raw-material availability. The U.S. EPA notes more than US$50 billion for drinking water, wastewater and stormwater infrastructure, while USGS estimated world sulfur production at 84 million tons in 2025, supporting feedstock availability for sulfur-based chemicals. The IEA has stated that the water sector accounts for about 4% of global electricity consumption, while wastewater treatment represents roughly one-quarter of water-sector electricity use, encouraging utilities to optimize treatment chemistry and operating efficiency.

Changsha Weichuang Chemical Co. Ltd. presents itself as a manufacturer and exporter of sodium thiosulfate, sodium metabisulfite, sodium sulfite, and ferrous carbonate. Public listings state that the company was founded in 2000, operates two plants, covers 28,000 m², has fixed assets of RMB 12 million, and employs around 210 people; another trade listing cites sodium thiosulfate capacity of 3,000 mt/month for each product line. No verified 2025 partnership, agreement, merger, or acquisition was found for Changsha Weichuang Chemical Co. Ltd.

Key Takeaways

• Sodium Thiosulfate Market size is expected to be worth around USD 210.2 Million by 2035, from USD 120.2 Million in 2025, growing at a CAGR of 5.8%.
• 0.99 held a dominant market position, capturing more than a 45.8% share in the Sodium Thiosulfate market.
• Technical Grade held a dominant market position, capturing more than a 56.6% share in the Sodium Thiosulfate market.
• Crystals held a dominant market position, capturing more than a 44.1% share in the Sodium Thiosulfate market.
• Water Treatment held a dominant market position, capturing more than a 36.9% share in the Sodium Thiosulfate market.
• Asia-Pacific held a dominant position in the global Sodium Thiosulfate market, accounting for 45.3% of the total market share and reaching a value of USD 54.3 million.

By Purity Analysis

0.99 Purity dominates with 45.8% share due to its strong use across water treatment and industrial processing

In 2025, 0.99 held a dominant market position, capturing more than a 45.8% share in the Sodium Thiosulfate market. The segment maintained strong demand because of its high effectiveness and stable chemical composition, making it suitable for industrial applications where consistent performance is important. Industries such as water treatment, textile processing, photography chemicals, and gold extraction continued to prefer 0.99 purity sodium thiosulfate due to its reliable reaction properties and lower impurity levels. Its broad compatibility with industrial systems also supported large-scale adoption across both developed and emerging markets.

By Grade Analysis

Technical Grade leads the market with 56.6% share driven by its wide industrial and water treatment usage

In 2025, Technical Grade held a dominant market position, capturing more than a 56.6% share in the Sodium Thiosulfate market. The segment saw strong demand from industries such as water treatment, textile manufacturing, mining, and chemical processing, where cost-effective and reliable chemical performance remained a key requirement. Technical grade sodium thiosulfate continued to be preferred because it offers suitable purity levels for large-scale industrial operations while remaining economical for bulk consumption. Its easy availability and broad application range supported consistent demand across both developed and emerging industrial markets.

By Form Analysis

Crystals form leads with 44.1% share due to easy handling and strong industrial demand
In 2025, Crystals held a dominant market position, capturing more than a 44.1% share in the Sodium Thiosulfate market. The crystal form remained widely preferred across several industries because of its longer shelf life, stable composition, and ease of storage and transportation. Industries involved in water treatment, mining, photography chemicals, and textile processing continued to use crystal sodium thiosulfate in large quantities due to its convenient handling and effective dissolution properties. Its ability to maintain chemical stability during storage made it a practical option for industrial buyers managing bulk inventories.

By Application Analysis

Water Treatment leads with 36.9% share driven by rising demand for safe and efficient water purification

In 2025, Water Treatment held a dominant market position, capturing more than a 36.9% share in the Sodium Thiosulfate market. The segment experienced strong demand as governments and industries increased investments in water purification and wastewater management systems. Sodium thiosulfate remained widely used for dechlorination processes, especially in municipal water treatment facilities where removing excess chlorine before discharge is essential for environmental safety. Its effectiveness, affordability, and easy handling made it a preferred chemical solution across large-scale treatment operations.

Key Market Segments

By Purity

• 0.99
• 0.05
• 0.05

By Grade

• Technical Grade
• Pharmaceutical Grade
• Food Grade

By Form

• Crystals
• Powder
• Solution

By Application

• Water Treatment
• Textile Processing
• Photography
• Food Additives
• Others

Emerging Trends

Rising focus on water reuse and circular water systems is becoming a major trend in the sodium thiosulfate market

One of the latest trends shaping the Sodium Thiosulfate market is the growing global shift toward water reuse and circular wastewater management systems. Industries are increasingly treating wastewater as a reusable resource instead of disposing of it after single use. This trend is creating higher demand for dechlorination chemicals such as sodium thiosulfate, especially in industrial recycling and municipal water treatment facilities.

• According to UN-Water, only 38% of industrial wastewater is currently treated safely, while the potential for wastewater reuse globally is estimated at nearly 320 billion cubic meters every year.

Governments are also supporting large-scale reuse programs to reduce freshwater stress. The United Nations Sustainable Development Goal 6 encourages countries to expand wastewater recycling and reuse technologies before 2030. In 2025, several industrial sectors including textiles, chemicals, food processing, and power generation increased investments in closed-loop water systems to lower freshwater dependency.

Expansion of sustainable aquaculture is increasing the use of water treatment chemicals

Another major trend influencing the Sodium Thiosulfate market is the rapid expansion of global aquaculture and seafood farming activities. Aquaculture operations require careful water quality management, and sodium thiosulfate is commonly used to neutralize chlorine and maintain safer aquatic environments.

• According to the Food and Agriculture Organization (FAO), global fisheries and aquaculture production reached a record 223.2 million tonnes in 2022, while aquaculture production alone crossed 130.9 million tonnes for the first time.

Governments are also encouraging sustainable aquatic food production to improve food security and reduce pressure on natural fisheries. In many Asian countries, seafood exporters are investing in advanced water treatment systems to meet stricter food safety and environmental standards in global trade markets.

Drivers

Growing wastewater treatment projects are increasing the demand for sodium thiosulfate

One of the biggest drivers for the Sodium Thiosulfate market is the rapid growth of wastewater treatment and water recycling activities across the world. Sodium thiosulfate is widely used to remove chlorine from treated water before it is released into rivers, lakes, or reused for industrial and agricultural purposes. Governments are investing heavily in clean water infrastructure as concerns over water pollution and water scarcity continue to rise. According to the United Nations World Water Development Report, wastewater treatment directly affects water quality and long-term water availability for communities and industries.

In agriculture and municipal systems, treated wastewater reuse is also increasing steadily. Reports linked with FAO mention that many countries are expanding treated wastewater use to support irrigation and industrial needs. In India alone, urban centers generate nearly 72,368 million liters of wastewater per day, while only around 44% is treated before discharge. This growing gap between wastewater generation and treatment is creating strong demand for chemicals like sodium thiosulfate that help make treated water safer for reuse and environmental discharge. The chemical is especially valued because it neutralizes chlorine effectively without producing harmful residues.

Government water safety regulations are supporting higher product consumption

Stricter environmental regulations and public water safety programs are also supporting the growth of sodium thiosulfate usage worldwide. Many environmental agencies now require proper dechlorination of wastewater before discharge to protect aquatic ecosystems and reduce chemical toxicity in natural water bodies. The U.S. Environmental Protection Agency recommends sodium thiosulfate as a dechlorinating agent for water samples and treated effluents containing residual chlorine.

Technical guidelines from EPA-linked water treatment documents also state that around 6.7 mg/L of anhydrous sodium thiosulfate is required to neutralize 1.0 mg/L of chlorine in water systems. As governments continue tightening wastewater discharge standards, industries are being pushed to adopt reliable chlorine removal methods before releasing water into the environment. Countries in Asia-Pacific, the Middle East, and North America are expanding desalination and wastewater recycling infrastructure, which is further supporting chemical demand.

Restraints

Strict chemical handling and disposal regulations are limiting wider sodium thiosulfate adoption

One of the major restraining factors for the Sodium Thiosulfate market is the increasing pressure from environmental and chemical safety regulations related to storage, transportation, and wastewater discharge. Although sodium thiosulfate is widely used in water treatment and industrial processing, improper disposal can still affect water quality and chemical balance in sensitive ecosystems. Many industries are now required to follow strict wastewater monitoring systems, which increases operational costs for chemical users.

According to the United States Environmental Protection Agency (EPA), industrial facilities must meet strict effluent discharge standards under the Clean Water Act, especially when chemicals are released into public water systems. These regulations often require additional treatment equipment and monitoring investments, creating financial pressure on smaller industrial users.

Availability of alternative water treatment chemicals is creating market competition

Another key challenge for the Sodium Thiosulfate market is the growing use of alternative dechlorination and water treatment chemicals across industrial and municipal sectors. Many water treatment operators are increasingly evaluating other chemical solutions that offer lower storage risks, simpler handling processes, or reduced operational costs. Chemicals such as sodium bisulfite and activated carbon systems are being adopted in some facilities depending on local regulations and treatment requirements.

Government-backed water treatment modernization programs are also encouraging industries to adopt advanced filtration and non-chemical purification technologies. According to the International Energy Agency (IEA), global investment in water-related infrastructure and efficiency technologies continues to rise as industries focus on sustainability and lower chemical dependence.

Opportunity

Expansion of water recycling projects is creating strong growth opportunities for sodium thiosulfate

One major growth opportunity for the Sodium Thiosulfate market is the rapid expansion of water recycling and reuse projects across industrial and municipal sectors. Governments worldwide are investing heavily in wastewater recovery systems as freshwater resources continue to decline.

Sodium thiosulfate plays an important role in these systems because it is widely used for dechlorination before treated water is reused or safely discharged into the environment. According to the United Nations, nearly 2.3 billion people currently live in water-stressed countries, increasing the urgency for recycled water infrastructure and safe treatment technologies.

Large industries such as food processing, beverage manufacturing, and agriculture are also increasing investments in water reuse systems to reduce operational costs and meet environmental regulations. The Food and Agriculture Organization (FAO) states that agriculture accounts for around 72% of global freshwater withdrawals, making efficient water management a major global priority.

Rising aquaculture and seafood production is opening new industrial demand

The growing aquaculture and seafood processing industry is another important opportunity for the Sodium Thiosulfate market. The chemical is commonly used in aquaculture systems for water conditioning and chlorine removal to maintain safe environments for fish and seafood production.

As global seafood consumption continues to rise, governments and food organizations are supporting expansion of aquaculture farming to improve food security and reduce pressure on wild fisheries. According to the Food and Agriculture Organization (FAO), global aquaculture production reached more than 94 million tonnes in recent years, showing strong long-term growth in fish farming activities.

Regional Insights

Asia-Pacific dominates the Sodium Thiosulfate market with 45.3% share supported by strong industrial and water treatment demand

In 2025, Asia-Pacific held a dominant position in the global Sodium Thiosulfate market, accounting for 45.3% of the total market share and reaching a value of USD 54.3 million. The region maintained its leadership due to rapid industrial growth, expanding water treatment infrastructure, and rising chemical consumption across countries such as China, India, Japan, and South Korea. Growing urban populations and increasing industrial wastewater generation continued to drive demand for sodium thiosulfate in municipal and industrial water treatment applications.

The presence of large textile, paper, and chemical manufacturing industries across the region also supported consistent product consumption during 2025 and 2026. Additionally, lower manufacturing costs, easy raw material availability, and expanding export activities strengthened regional production capacity. Growing environmental regulations related to wastewater discharge and industrial emissions are expected to further support sodium thiosulfate demand across Asia-Pacific in the coming years, helping the region maintain its dominant market position globally.

Key Regions and Countries Insights

• North America
  • US
  • Canada
• Europe
  • Germany
  • France
  • The UK
  • Spain
  • Italy
  • Rest of Europe
• Asia Pacific
  • China
  • Japan
  • South Korea
  • India
  • Australia
  • Rest of APAC
• Latin America
  • Brazil
  • Mexico
  • Rest of Latin America
• Middle East & Africa
  • GCC
  • South Africa
  • Rest of MEA

Key Players Analysis

Ampak Chemicals Inc. is a specialty chemical supplier serving industrial and water treatment markets across North America. The company offers sodium thiosulfate products for laboratory, industrial, and environmental applications. It maintains distribution support for bulk and packaged chemical solutions through multiple supply channels. The company focuses on maintaining product consistency, timely delivery, and long-term industrial partnerships.

Changsha Weichuang Chemical Co. Ltd is a China-based chemical manufacturer involved in the production and export of sodium thiosulfate and other industrial chemicals. The company serves customers in over 30 countries across Asia, Europe, and the Middle East. Its manufacturing operations support bulk industrial demand from mining, textile, and water treatment industries.

Fennec Pharmaceuticals is a specialty pharmaceutical company known for developing sodium thiosulfate-based therapeutic solutions. The company focuses primarily on medical applications, particularly treatments designed to reduce hearing loss risks associated with chemotherapy. Its product development activities are supported through clinical research, regulatory approvals, and healthcare partnerships.

Top Key Players Outlook

• Ampak Chemicals Inc.
• Changsha Weichuang Chemical Co. Ltd
• Esseco SRL
• Fennec Pharmaceuticals
• Haimen Wuyang Chemical Industry Co. Ltd
• Ineos
• Lakshmi Chemical Industries
• Liyang Qingfeng Fine Chemical Co. Ltd
• Nilkanth Organics
• Nissei Corporation
• Sankyo Kasei Co. Ltd

Recent Industry Developments

In 2026, Esseco signed an agreement to acquire INOVYN Produzione Italia SpA, including 2 sites in Italy, more than 185 employees, and capacity that would double its chlor-alkali division if approved. The group also reported 8 production sites, operations in 10 countries, around 725 employees, and 2,500 customers. No direct sodium thiosulfate merger was reported, but its 2026 acquisitions, water-treatment partnerships, South America capacity investments, and new product diversification support stronger supply positioning.

Report Scope