Hdtmpa

HDTMPA (CAS 23605-74-5), also known as HDTMP, HMDTMP, and commercially as Dequest 2051 and Dequest 2054, is a phosphonate chelating agent with the molecular formula C10H28N2O12P4. It carries no assigned E-code and is classified under chelating agents for industrial use.

In water treatment, HDTMPA inhibits scale formation by binding calcium, magnesium, and iron ions before they precipitate onto heat exchanger surfaces. In oil and gas applications, it controls mineral scale deposition in pipelines and injection wells. In textile and paper processing, it sequesters hardness ions that would otherwise interfere with dyeing and bleaching chemistry.

HDTMPA is supplied in liquid form and is subject to REACH registration requirements within the European Union. It is not assigned an E-code, confirming its industrial rather than food-grade classification. Procurement teams should request safety data sheets and REACH compliance documentation when sourcing from European distributors.