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2-Phosphonobutane-1,2,4-Tricarboxylic Acid (PBTCA)

CAS Number: 37971-36-1

PBTCA combines both phosphonate and carboxylate functional groups, giving it dual scale inhibition and dispersancy performance in industrial water systems. It is especially effective in high-pH and high-alkalinity cooling water systems where conventional phosphonates may precipitate. PBTCA also exhibits synergistic corrosion inhibition when used with zinc salts and azoles.

Technical Specifications

density1.20–1.25 g/cm³
chloride≤1%
appearanceLight yellow liquid
activeContent≥50%
pH (1% solution)2.0

Applications

  • High-alkalinity cooling water treatment
  • Calcium carbonate and calcium phosphate scale inhibition
  • Dispersant for silt and iron oxide
  • Synergistic corrosion inhibition programs
  • Industrial process water treatment

Key Features

  • Stable at high pH without precipitation
  • Dual functionality: scale inhibition and dispersancy
  • Superior performance under high-alkalinity conditions
  • Excellent synergy with zinc and azole corrosion inhibitors

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2-Phosphonobutane-1,2,4-Tricarboxylic Acid (PBTCA) chemical structure

CAS Number

37971-36-1

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