Ethylenediaminetetra(methylenephosphonic acid)

Ethylenediaminetetra(methylenephosphonic acid) (CAS 1429-50-1), commonly known as EDTMP, is a phosphonate chelating agent.

Where is Ethylenediaminetetra(methylenephosphonic acid) used?

• Water treatment and cooling water systems: controls calcium carbonate scale
• Boilers and heat exchangers: manages calcium sulfate scale deposition, extending equipment service life
• Oilfield: scale inhibitor and corrosion control additive in injection water
• Produced water handling: maintains system integrity
• Textile and paper processing: sequesters hardness ions and trace metals that interfere with bleaching and dyeing
• Coatings and cleaning formulations: stabilizes peroxide-based systems and prevents metal-catalyzed decomposition
• It binds calcium, magnesium, iron, and other metal ions to prevent scale formation and inhibit corrosion in high-temperature, high-hardness water systems.

Good to know: Purity and active content are the primary quality parameters buyers should confirm.

Commercial specifications

• Aqueous solution, typically at concentrations around 20–50%
• Also in solid form for dry blending or concentrated dosing