Providing excellence in service

and technical support

for our customers

TER AS Productos was founded in Barcelona in 2009 with the objective to strengthen the position of TER GROUP in the Spanish market. During the last years we have grown constantly gaining an important position in the different sectors our customers are part of.



1-Hydroxy Ethylidene-1,1-Diphosphonic Acid and its salts (e. g. HEDP Na4)


HEDP is used as chelating agent (especially for metal ions such as Fe, Cu and Zn), corrosion inhibitor and stabilizing agent (water hardness, peroxides) in the detergents industry, water treatment, metallurgy and dyeing industry.

More Phosphonates

All products

Contact Person

Alexander Sielmann


General Manager