Phosphino Carboxylic Acid (PCA)
Phosphino carboxylic acid is a low-molecular-weight copolymer combining phosphino and carboxylic acid functional groups, providing excellent scale inhibition and dispersion in high-hardness, high-temperature, and high-pH cooling water and boiler systems. It demonstrates superior threshold inhibition of calcium carbonate, calcium sulfate, and calcium phosphate compared to conventional polycarboxylates. PCA is a key component in non-phosphonate, environmentally progressive water treatment formulations.
Technical Specifications
| density | 1.15–1.25 g/cm³ |
| appearance | Pale yellow to amber liquid |
| pH (as is) | 2.0–4.0 |
| solidContent | 48–52% |
| molecularWeight | 2,000–5,000 g/mol |
Applications
- High-temperature cooling water scale inhibition
- High-pH alkaline cooling water programs
- Boiler water scale and deposit control
- Calcium phosphate scale inhibition
- Environmentally progressive water treatment programs
Key Features
- Outstanding scale inhibition at high temperatures (up to 250°C)
- Effective at high pH without precipitation
- Excellent calcium phosphate threshold inhibition
- Key component in non-phosphonate green formulations
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