Hydrolyzed Polymaleic Anhydride (HPMA) CAS 26099-09-2

Product Overview

Hydrolyzed Polymaleic Anhydride (HPMA) is a low-molecular-weight polymer based on maleic anhydride, specially designed as a high-efficiency scale inhibitor and dispersant for industrial water treatment. It offers excellent performance under high temperature and alkaline conditions and is widely used in circulating cooling water, boiler water, desalination, and oilfield water systems.

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Key Identification

• CAS: 26099-09-2
• Einecs (EC No.): 607-861-7
• Molecular Formula (repeat unit): (C₄H₄O₄)ₓ
• Grade: Industrial grade, 50% aqueous solution (water treatment grade)
• Package: 200 kg HDPE drum / 1000 kg IBC tote, or customized packing as required

HPMA is phosphorus-free, readily soluble in water, and shows strong threshold inhibition and dispersion toward carbonate and phosphate scales, making it suitable for modern, environmentally conscious water treatment formulations.

Physicochemical Properties

*The above values are typical data from industrial-grade HPMA supplied by Chinese manufacturers and are not to be taken as product specifications for any specific lot.

Applications

1. Industrial circulating cooling water & boiler water

• Acts as a threshold scale inhibitor and dispersant for calcium carbonate, calcium phosphate and other inorganic scales.
• Used alone or in combination with organic phosphonates to reduce scale deposition and improve heat-exchange efficiency in recirculating cooling systems, low-pressure boilers and closed-loop water systems.

2. Desalination & evaporator systems

• Suitable for high-temperature, high-salinity conditions such as multi-stage flash (MSF) and other desalination units, helping to control carbonate/phosphate scale and extend online operation time.

3. Oilfield water treatment

• Applied in injection water, crude oil dewatering systems, and low-pressure boilers in oilfields to control scale, maintain pipeline cleanliness, and protect equipment surfaces.

4. Detergents & daily chemicals

• Used as a dispersant in detergents to prevent inorganic salts and soil particles from redepositing on textiles, especially under hard-water conditions.

5. Cement additive & soil conditioner

• Serves as a dispersing/water-reducing component in cement formulations and as a soil improver in saline or alkaline soils, leveraging its polyelectrolyte nature.

For detailed formulation advice and dosage recommendations in your specific system, please contact:
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Storage Conditions

• Store in a cool, dry, and well-ventilated warehouse.
• Keep container tightly closed; protect from direct sunlight and high temperatures.
• Recommended storage temperature: 0–40 °C; avoid freezing (precipitation or stratification may occur at low temperatures).
• Shelf life: typically 12 months in original, unopened packaging under recommended conditions.
• If long-term storage leads to slight stratification or turbidity, mix or stir thoroughly before use; performance is usually not affected.

Safety Precautions

• HPMA solutions are acidic; avoid direct contact with skin, eyes, and clothing.
• Wear appropriate personal protective equipment (PPE): chemical-resistant gloves, safety goggles/face shield, and protective clothing when handling.
• In case of skin contact: immediately wash with plenty of water and soap. Remove contaminated clothing.
• In case of eye contact: rinse cautiously with clean water for at least 15 minutes and seek medical attention if irritation persists.
• If swallowed: rinse mouth with water, do not induce vomiting; seek medical advice.
• Ensure good ventilation in working areas; avoid aerosol generation and splashing.
• Spillage: contain and absorb with inert material (sand/earth), collect into suitable containers for disposal according to local regulations.

For the latest SDS and regulatory documentation, please request it from:
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