Polyacrylic Acid (PAA 50%)
Low molecular weight acrylic homopolymer designed as a premium scale inhibitor and mineral dispersant. Disperses calcium carbonate, calcium sulfate, and particulate silt with >98.5% threshold efficiency.
Technical Specification Target
Product Mechanism & Performance
Polyacrylic Acid acts through three synergistic mechanisms: threshold scale inhibition, crystal lattice distortion, and electrostatic particle dispersion. It prevents precipitation of calcium salts even at low sub-stoichiometric concentrations.
In recirculating cooling loops and reverse osmosis membranes, PAA adsorbs onto micro-crystallites of CaCO₃ and CaSO₄, causing structural deformities that prevent them from adhering to heat-transfer metal surfaces.
Standard Industrial Dosage
| Application | Recommended Dosing |
|---|---|
| Open Cooling Towers | 5.0 – 20.0 ppm active |
| Low-Pressure Boilers | 10.0 – 30.0 ppm |
| RO Antiscalant Blends | 2.0 – 6.0 ppm |
| Textile Scouring Auxiliaries | 1.0 – 3.0 g/L |
Packaging, Handling & Storage
- Packaging Options: 50 kg HM-HDPE carboys, 250 kg HDPE drums, 1,250 kg IBC totes, and bulk dedicated ISO road tankers.
- Storage Conditions: Store in a cool, well-ventilated dry warehouse away from direct sunlight, freezing conditions, and strong oxidizing agents.
- Shelf Life: 12 months in unopened original containers at 5°C to 40°C.
- Handling Safety: Acidic liquid. Wear nitrile gloves, safety goggles, and protective workwear. In case of skin or eye contact, flush immediately with copious water.
Frequently Asked Questions: Polyacrylic Acid (PAA 50%)
Expert technical answers on dosing, chemistry, handling, and application performance.
Q1. What is Polyacrylic Acid (PAA 50%) and how does it prevent scale in water systems?
Polyacrylic Acid (PAA 50%, CAS 9003-01-4) is a low molecular weight anionic acrylic homopolymer that prevents scale formation via three mechanisms: threshold scale inhibition, crystal lattice distortion, and electrostatic dispersion of calcium carbonate, calcium sulfate, and mineral silt.
Q2. What is the recommended dosage of PAA 50% in cooling towers and boilers?
For open recirculating cooling towers, the typical active dosage is 5.0 to 20.0 ppm. In low to medium pressure steam boilers (<40 bar), recommended dosing is 10.0 to 30.0 ppm. For reverse osmosis pre-treatment antiscalant blending, 2.0 to 6.0 ppm active is standard.
Q3. Is ZEELCHEM™ 1000 Polyacrylic Acid compatible with oxidizing biocides like chlorine?
Yes, ZEELCHEM™ 1000 exhibits good chemical stability in the presence of standard oxidizing biocides (chlorine, sodium hypochlorite, bromine, and chlorine dioxide) within customary cooling tower residual ranges (0.2 to 1.0 ppm free chlorine).
Related Scale Inhibitors & Additives
Polymaleic Acid (PMA 50%)
High-temperature scale inhibitor up to 300°C for steam boilers and desalination.
MA/AA Copolymer 50%
Synergistic maleic-acrylic copolymer for high thermal stress cooling loops.