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Ethylene Diamine Tetra (Methylene Phosphonic Acid) Sodium Salt (EDTMPS)

CAS No. 22036-77-7 EINECE NO. 244-742-5
Molecular Formula C6H12O12N2P4Na8 Molecular Weight 612.13
Structural Formula

edtmps Structural Formula

Product Features

EDTMPS is Octasodium salt of EDTMPA.EDTMPS is a cathodic corrosion inhibitor.Compared with inorganic polyphosphate, the corrosion inhibition rate is 3 to 5 times higher. It is miscible with water, non-toxic and non-polluting.

Technical Specification

Parameter Standard
Appearance Amper transparent liquid
Active component (EDTMPS), % 28.0min
Phosphorous acid (as PO33-), % 5.0max
Phosphoric acid (asPO43-), % 1.0max
pH (1% water solution) 9.5-10.5
Density (20℃), g/cm3 1.25min
Chloride (Cl-), % 3.0max

Applications & Usage

EDTMP.Na5 can be used as scale and corrosion inhibitor for circulating water and boiler water system, chelating agent in non-cyanide electroplating, water-softening agent in dyeing industry, etc.

Scale and Corrosion inhibition Performance

CaCO3 inhibition CaSO4 inhibition Ca3(PO4)2 inhibition CaC2O4 inhibition BaSO4 inhibition
Good Very Good Very Good Good Very Good
Calcium Tolerance Iron Control Sequestration Steel corrosion inhibition
Good Yes Excellent Very Good

Applications & Usage

EDTMPS is used in circulating cool water system and boiler water as corrosion inhibitor. EDTMPS is a chelating agent in non-cyanogen electroplating industry and a water-softening agent in printing & dyeing industry. When EDTMPS is used alone, 2~10mg/L dosage is preferred. EDTMPS can also be used in combination with BTA, PAAS and zinc salt.

Package & Storage

EDTMP•Na5 Liquid
25L Drum 200L Drum 1000L IBC ISO Tank
25kg Bag 200L Drum packaging
Storage for ten months in shady room and dry place.

Hazard & Safety Precaution

Hazard Information Safety Precaution

Not regulated

Wear protective gloves Wear protective goggles Wear protective clothing

Once contacted with eye and skin, flush with plenty of clean water

Alternative Name / Synonyms

  2. Ethylene Diamine Tetra (Methylene Phosphonic Acid) Sodium Salt