The recommended dosage of Maleic-Acrylic Acid Copolymer (MA/AA) is typically 2–10 mg/L when used as a water treatment agent in combination with other organic phosphonates.
Dosage by Application
Application Recommended Dosage Notes
Circulating Cooling Water (with organic phosphonates) 2–10 mg/L The standard range for synergistic scale inhibition
Textile/Dyeing Auxiliary or Detergent Builder Determined by testing No fixed general dosage; must be optimized experimentally
Detergent Compositions (dispersant/anti-redeposition) 0.1%–10% by weight (typically 0.4%–5%) Formulation percentage, not a water-treatment dosing rate
Performance Context
At a concentration of 10 mg/L, MA/AA achieves inhibition efficiencies of approximately 98% for calcium carbonate, 92% for calcium phosphate, and ~100% for calcium sulfate under standard test conditions. A related copolymer study found that just 3 mg/L could reach 91.35% inhibition at 80°C with high calcium hardness, demonstrating effectiveness at the low end of the range.
Practical Considerations
Synergistic Use: MA/AA is typically formulated with organic phosphonates (e.g., HEDP, ATMP) for best cost-performance.
Water Chemistry: Actual dosage should be adjusted based on calcium hardness, pH, and temperature. Higher hardness or temperature may require dosing toward the upper end.
Safety: The product is acidic (1% solution pH 2.0–3.0). Avoid skin and eye contact; flush with water if contact occurs.