PBTC Technical Indicators

Here's a concise technical overview of PBTC (2-Phosphonobutane-1,2,4-Tricarboxylic Acid) key performance indicators in table format:

PBTC Technical Specifications

Property Value Significance

Chemical Formula C₇H₁₁O₁₀P Phosphono-carboxylic acid structure

Active Content 50% (typical commercial solution) Concentration for dosing calculations

pH (1% solution) 1.5-2.5 Strongly acidic nature

Density (20°C) 1.28-1.35 g/cm³ Handling and storage considerations

Performance Indicators

Parameter Performance Data Superiority vs HEDP/ATMP

CaCO₃ Inhibition 90% @ 2-5 ppm 2-3x more efficient than HEDP

Chlorine Resistance Stable @ 10 ppm free chlorine Maintains efficacy in chlorinated systems

Thermal Stability Up to 120°C continuous operation Better than ATMP (>100°C)

Calcium Tolerance >1000 mg/L without precipitation Higher threshold than ATMP (500 mg/L)

Application Guidelines

System Type Dosage Range Notes

Cooling Water Systems 5-20 mg/L Often blended with polymers

RO Membrane Antiscalant 2-10 mg/L Low phosphorus alternative

Oilfield Water Treatment 10-50 mg/L Effective against BaSO₄/SrSO₄ scales

Environmental Profile

Characteristic Data Regulatory Status

Biodegradability <20% (OECD 301D) Not readily biodegradable

Aquatic Toxicity (EC50) >100 mg/L (Daphnia magna) Classified as low toxicity

Phosphorus Content ~7.5% (lower than HEDP/ATMP) Reduced environmental impact

Key Advantages:

Excellent scale inhibition at low doses

Superior chlorine/oxidant resistance

Broad pH (4-10) and temperature stability

Compatible with zinc and other treatment additives

Testing Methods:

Residual analysis: HPLC (UV detection at 210nm)

Performance testing: NACE Standard TM0374-2007

Typical Shelf Life: 2 years in original packaging at ambient temperature

For specific product grade specifications, consult manufacturers like Solvay (Cariat® series) or BASF (Sokalan® PBTC).