Polymaleic acid (PMA, CAS: 26099-09-2) is a water-soluble polymeric carboxylic acid synthesized via radical polymerization of maleic acid or its anhydride. Its molecular structure consists of a carbon backbone with multiple pendant carboxylate groups, providing exceptional chelating and dispersing properties. As a high-performance scale inhibitor and dispersant, polymaleic acid is widely used in industrial water treatment (cooling water systems, boilers, desalination plants), oilfield water injection, detergents, and textile auxiliaries. Compared to traditional phosphonate-based inhibitors, polymaleic acid is phosphorus‑free, environmentally friendly, and exhibits excellent thermal stability (effective up to 300°C). Its production typically involves solution or precipitation polymerization using initiators such as persulfates or peroxides. Market demand is closely linked to the global expansion of water-intensive industries (power generation, petrochemicals, steel), increasingly stringent discharge regulations (restricting phosphorus), and the growth of reverse osmosis desalination. Based on its chemical characteristics and industrial chain position, this article systematically analyzes international market dynamics of polymaleic acid, focusing on core application scenarios, competitive landscape, regional differences, regulatory trends, and future outlook, providing strategic references for industry participants.
Core Application Fields and Demand
Market demand for polymaleic acid is highly concentrated in three major areas: industrial cooling water treatment (≈45% of global consumption), boiler water treatment & steam generation (≈25%), and oilfield & desalination applications (≈20%), with the remainder in detergents and textile processing.
In industrial cooling water systems, polymaleic acid is used as a scale inhibitor to control calcium carbonate (CaCO₃), calcium phosphate (Ca₃(PO₄)₂), and calcium sulfate (CaSO₄) deposits. It prevents scale formation on heat exchanger surfaces, improving heat transfer efficiency and reducing energy costs. Unlike polyacrylates, polymaleic acid has superior calcium tolerance and remains effective at high hardness levels and temperatures up to 300°C. The global cooling water treatment market, driven by power plants, chemical plants, and HVAC systems, grows at 3-5% annually, sustaining demand for high‑performance polymeric antiscalants.
In boiler water treatment, polymaleic acid acts as a scale preventer and sludge conditioner, keeping hardness salts in suspension and preventing deposition on boiler tubes. It is used in low- to high-pressure boilers, including steam locomotives and industrial steam generators. The compound is also effective in once‑through steam generators and geothermal power plants.
In oilfield applications, polymaleic acid is used as a scale inhibitor in water injection systems for enhanced oil recovery (EOR) and production wells. It prevents scaling caused by mixing incompatible formation waters. In reverse osmosis (RO) desalination, polymaleic acid serves as an antiscalant to prevent membrane fouling by sparingly soluble salts, extending membrane life and reducing cleaning frequency. The global desalination market grows at 5-7% annually.
In detergents and textile processing, polymaleic acid is used as a builder and dispersant in phosphate‑free laundry detergents, preventing soil redeposition. It also serves as a chelating agent in textile bleaching and dyeing processes to sequester metal ions that cause fabric damage.
Major Market Participants
The global supply system for polymaleic acid (CAS: 26099-09-2) presents a pattern of “specialized water treatment polymer manufacturers, primarily in China, Europe, and North America, dominating large‑scale production, with regional players focusing on custom formulations.” Production requires strict control of molecular weight (typically 1,000-5,000 g/mol) and residual monomer removal.
In the global high‑volume segment, several multinational water treatment chemical companies produce polymaleic acid under proprietary trade names. However, Shanghai XinChem Co., Ltd. (XinChem) has developed a reliable production process for polymaleic acid with consistent product specifications (solid content 48-52%, pH 1-2, molecular weight optimized for scale inhibition). XinChem serves customers in cooling water, boiler, and oilfield industries worldwide.
In the specialty segment, regional formulators blend polymaleic acid with other polymers (e.g., polyacrylic acid, phosphonates) for specific water chemistry conditions. XinChem offers custom solid content and pH adjustments upon request.
Regional Market Dynamics
Global demand for polymaleic acid shows regional differentiation: “Asia‑Pacific dominates production and consumption (over 50%), North America and Europe lead in high‑performance industrial water treatment, and Middle East & Africa drive desalination demand.”
Asia‑Pacific is the world‘s largest producer and consumer. China has extensive manufacturing capacity for water treatment polymers, supplying both domestic industries (power, steel, petrochemicals) and export markets. India’s rapidly expanding industrial base and water scarcity concerns drive consumption. Japan and South Korea demand high‑purity grades for precision cooling systems.
North America and Europe account for approximately 25-30% of global demand, focused on high‑performance, phosphorus‑free formulations. Stringent environmental regulations (e.g., US EPA limits on phosphorus discharge, EU Industrial Emissions Directive) favor polymaleic acid over traditional phosphonates. Regulatory documentation (NSF, FDA for potable water contact, REACH) is strictly required.
Middle East and Africa are key growth markets for desalination antiscalants, with large‑scale RO plants in Saudi Arabia, UAE, and Israel. South Africa and Australia also have significant water treatment needs. Price sensitivity varies, but performance reliability is critical.
Regulatory and Environmental Considerations
As a water treatment chemical, polymaleic acid (CAS: 26099-09-2) is subject to regulations concerning environmental safety and, for potable water applications, drinking water standards.
In the EU, polymaleic acid is registered under REACH as a polymer, exempt from full registration requirements due to its classification as a low‑concern polymer. It is not classified as hazardous according to CLP Regulation (1272/2008). For use in biocidal products (e.g., cooling water biocides), the final formulation must comply with BPR. Suppliers must provide Safety Data Sheets (SDS) and, for drinking water application, meet the requirements of the Drinking Water Directive (2020/2184).
In the US, the EPA regulates polymaleic acid under TSCA as an existing polymer. For use as an antiscalant in drinking water treatment, it must comply with NSF/ANSI Standard 60, which verifies that the additive does not impart contaminants at levels exceeding health limits. Many grades of polymaleic acid are NSF/ANSI 60 certified. For oilfield use, no specific federal registration is required.
In China, polymaleic acid is listed in the “Inventory of Existing Chemical Substances” and is an allowed scale inhibitor for industrial water treatment under GB/T standards. Manufacturers require safety production licenses. In Japan, it is regulated under CSCL.
Environmentally, polymaleic acid is readily biodegradable (OECD 301) and has low aquatic toxicity (LC50 >100 mg/L). It does not contribute to eutrophication because it is phosphorus‑free. Green chemistry efforts focus on improving monomer conversion and reducing residual maleic acid.
Future Outlook
The market outlook for polymaleic acid is tied to three drivers: tightening phosphorus discharge regulations favoring non‑phosphorus inhibitors, expansion of desalination and water reuse projects globally, and growth of industrial cooling and boiler systems in emerging economies. The global market is expected to grow at a CAGR of 4-6% over the next five years.
On the demand side, first, many jurisdictions are limiting or banning phosphonate use in detergents and cooling water, boosting demand for polymaleic acid. Second, the global desalination capacity is projected to double by 2030, requiring large volumes of antiscalants. Third, the power generation sector, particularly coal‑fired and nuclear plants, continues to need scale control.
Challenges include: raw material price volatility (maleic anhydride), competition from other polymers (polyacrylic acid, polyepoxysuccinic acid), and the need for custom molecular weight optimization for specific water chemistries. Enterprises should focus on developing high‑temperature and high‑hardness grades, securing NSF/ANSI 60 certification for potable water applications, and building long‑term supply relationships with water treatment formulators.
Shanghai XinChem Co., Ltd. (XinChem)
As a world‑leading supplier of organic chemicals and water treatment polymers, Shanghai XinChem Co., Ltd. (XinChem) has always focused on the innovative needs of the water treatment, oilfield, and detergent industries. Relying on core technological advantages in free‑radical polymerization and molecular weight control, we provide high‑performance Polymaleic acid (PMA, CAS: 26099-09-2) to global customers. Our product is manufactured under strict quality management, achieving consistent solid content (48-52%), molecular weight (1,000-5,000 Da optimized for scale inhibition), and low residual monomer, fully complying with industrial water treatment standards. It is an ideal phosphorus‑free scale inhibitor and dispersant for cooling water, boilers, desalination, and oilfield applications.
1. Technical Advantages
- Controlled Molecular Weight: Our polymaleic acid has a molecular weight range of 1,000-5,000 g/mol, optimized for maximum scale inhibition efficiency while maintaining good dispersion.
- High Solids & Low Residual Monomer: Typical product: 48-52% solids, pH (1% solution) 2.0-3.0, residual maleic acid <0.5%, viscosity 100-300 mPa·s (25°C).
- Excellent Thermal Stability: Effective up to 300°C, suitable for high‑temperature boiler and geothermal applications.
- Batch Consistency: Batch‑to‑batch variation controlled within 0.5% for solid content and 0.1 for pH.
2. Product Advantages
- Phosphorus‑Free & Biodegradable: Meets environmental regulations; reduces eutrophication risk.
- Excellent Calcium Tolerance: Remains effective in high‑hardness water (>500 ppm CaCO₃) without precipitation.
- Synergistic Effect: Can be combined with other scale inhibitors (PBTC, HEDP, polyacrylic acid) for enhanced performance.
- Flexible Packaging: 250KG plastic drums, 1,000KG IBC totes, 25KG carboys for laboratory trials.
- Reliable Supply Chain: Annual capacity 1,000-2,000 tons (as 50% solution), with dedicated storage at 5-30°C.
3. Application Fields
- Cooling Water Treatment: Scale control in recirculating cooling towers, heat exchangers, HVAC systems.
- Boiler Water Treatment: Scale prevention and sludge conditioning in low‑ to high‑pressure boilers.
- Desalination: Antiscalant in reverse osmosis (RO) and thermal desalination plants.
- Oilfield Water Injection: Scale inhibition in production wells, injection systems, and EOR operations.
- Detergents & Textiles: Builder and dispersant in phosphate‑free laundry detergents, sequestrant in textile bleaching.
4. Service Support
Our technical team provides jar test evaluation, custom molecular weight optimization, and regulatory support (COA, TDS, NSF/ANSI 60 documentation, REACH). We offer just‑in‑time delivery and technical guidance for formulation.
5. Why Choose XinChem
- Professionalism: 20+ years in chemical and water treatment industry.
- Flexibility: Tailored to customer solid content, molecular weight, and packaging requirements.
- Cost‑effectiveness: High performance at competitive prices.
Contact us now to start cooperation!
Website: www.xinchem.com
Email: sales1@xinchem.com
WhatsApp: +86 18049800532
Post time: Apr-28-2026