Hexanediaminetetra(methylenephosphonic acid)

Hexanediaminetetra(methylenephosphonic acid) (CAS 23605-74-5) is a phosphonate chelating agent used to control scale formation and metal ion interference.

Where is Hexanediaminetetra(methylenephosphonic acid) used?

• Industrial water treatment: inhibits calcium carbonate, calcium sulfate and barium sulfate scale deposition in cooling towers, boilers and reverse osmosis systems
• Oil and gas: prevents mineral scaling in injection water and produced water handling, protecting pipelines and downhole equipment
• Textile and leather processing: sequesters hardness ions during dyeing and finishing, protecting colorant consistency and bath stability
• Paper manufacturing: controls metal ions that catalyze peroxide decomposition during bleaching
• It remains stable and effective at elevated temperatures or under high hardness conditions.

Good to know: Strong calcium and heavy metal binding capacity; preferred where conventional chelants underperform.

Commercial specifications

• Aqueous solution, typically 30–40% active content
• Bulk supply in intermediate bulk containers (IBCs) and drums
• Larger quantities in isotanks