Chelating Agents
REACH
HDTMP hexapotassium salt
CAS Number
38820-59-6
EC Number
254-135-7
What is HDTMP hexapotassium salt?
HDTMP hexapotassium salt (CAS 38820-59-6), also referenced in procurement as K6HMDTMP, is the fully neutralized potassium form of hexamethylenediamine tetra(methylenephosphonic acid).
Where is HDTMP hexapotassium salt used?
- Water treatment: controls calcium carbonate and calcium sulfate
- Cooling towers, boilers and reverse osmosis systems: manages barium sulfate scale
- Oil and gas: prevents mineral deposition in oilfield water injection systems, pipelines and downhole equipment
- Textile and leather processing: sequesters hardness ions, improving dye uptake consistency and reducing metal interference in dyebaths and process water
- Paper manufacturing: stabilizes process water chemistry and inhibits scale on equipment surfaces throughout pulp and bleaching stages
- It functions as a scale inhibitor, corrosion inhibitor and chelating agent.
Good to know: Particularly effective at elevated temperatures and high pH where many phosphonates underperform.
Commercial specifications
- Active content typically 30–40%
- Bulk supply standard
Other Names (Synonyms)
Hexamethylenediamine tetra(methylenephosphonic acid), potassium salt|Phosphonic acid, p,p′-[1,6-hexanediylbis[nitrilobis(methylene)]]tetrakis-, potassium salt (1:?)|K6hmdtmp|Potassium [6-[bis[[hydroxy(oxido)phosphoryl]methyl]amino]hexyl-[[hydroxy(oxido)phosphoryl]methyl]amino]methyl-hydroxyphosphinate