CAS · 37971-36-1
Product Overview
2-Phosphonobutane-1,2,4-tricarboxylic acid is a high-purity surfactants supplied for industrial and specialty chemical applications. Contact our team for specifications, packaging options and lead times.
Product Specifications
| Appearance: | Colorless to light yellow transparent liquid |
|---|---|
| Active content (export sales): | 50% min |
| Phosphoric acid (as PO₄³⁻): | 0.2% max |
| Phosphorous acid (as PO₃³⁻): | 0.5% max |
| Density (20℃): | 1.27 g/cm³ min |
| pH (1%): | 1.5–2 |
| Fe ion: | 10 ppm max |
| Chloride (as Cl⁻): | 10 ppm max |
| Color: | 30 Hazen max |
Applications
1. Water Treatment (Cooling & Boiler Systems)
Functions as a scale inhibitor and corrosion inhibitor in industrial circulating cooling water, boiler water, and oilfield water injection systems.
Prevents precipitation of calcium carbonate, calcium sulfate, and barium sulfate.
2. Detergent Formulations
Used in formulations for household and industrial cleaning agents.
Chelates metal ions such as Ca²⁺ and Mg²⁺, enhancing cleaning performance in hard water.
3. Reverse Osmosis and Membrane Systems
Helps protect membranes from scaling and metal fouling in RO systems.
Compatible with polyamide and cellulose acetate membranes.
4. Textile and Dyeing Industries
Acts as a dispersant and chelating agent in textile processing.
Improves dye solubility and prevents metal ion interference during dyeing.
5. Pulp and Paper Industry
Used to prevent scale deposition on equipment and improve the efficiency of pulping processes.
Benefits
Excellent Scale Inhibition: Highly effective at preventing formation of calcium, magnesium, and barium scales.
Good Chelation: Strong ability to bind metal ions (Ca²⁺, Fe³⁺), reducing water hardness issues.
Thermal and Hydrolytic Stability: Performs well under high-temperature and acidic conditions, unlike many traditional chelators.
Low Phosphorus Content: Environmentally preferable compared to other phosphonates with higher phosphorus load.
Synergistic Effects: Often used in combination with polycarboxylates, zinc salts, or azoles for enhanced performance.
Conclusion
2-Phosphonobutane-1,2,4-tricarboxylic acid (PBTC, CAS 37971-36-1) is a highly efficient, multi-functional water treatment agent, valued for its anti-scaling, chelating, and corrosion-inhibiting properties. Its stability at high temperature and low pH, along with low phosphorus content, makes it ideal for cooling systems, RO plants, detergents, and industrial processing. PBTC continues to be a preferred choice in modern water treatment due to its performance and environmental profile.
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