2-Hydroxyethyliminodimethanephosphonic acid

2-Hydroxyethyliminodimethanephosphonic acid (CAS 5995-42-6), commonly referred to as HEIDP, is a phosphonate chelating agent used to control scale formation and metal ion interference in industrial water systems.

It binds calcium, magnesium, and heavy metal ions, preventing precipitation and deposit buildup in process equipment. In industrial water treatment, HEIDP is formulated into scale and corrosion inhibitor blends.

These blends are used for cooling water circuits, boilers, and reverse osmosis systems. Home care and institutional cleaning products use it to sequester hardness ions, improving surfactant performance and preventing redeposition.

In textile processing, it controls metal ion interference during dyeing and bleaching, protecting color consistency and fabric quality. Paper and leather manufacturing incorporate it into process water treatment.

This prevents mineral scaling on equipment and improves overall process efficiency. HEIDP is supplied as an aqueous solution, typically at concentrations around 30–50% for various industrial applications.

Technical grade is the standard commercial offering for water treatment and industrial cleaning applications. Buyers specifying phosphonate content should request lot-specific assay data for their records.

This data helps to confirm active acid concentration for formulation accuracy. Proper handling and storage are required to maintain the stability and effectiveness of the chemical solution over time.