Ethylene Diamine Tetra (Methylene Phosphonic Acid) Sodium Salt CAS NO.22036-77-7

Ethylenediamine tetramethylphosphonate sodium EDTMPS

Ethylene Diamine Tetra (Methylene Phosphonic Acid) Sodium Salt
Alias: ethylenediamine tetramethylphosphonate sodium
CAS No.22036-77-7
Molecular formula C6H12O12N2P4Na8

Molecular weight: 611.98

1.Performance and use:
EDTMPS is a nitrogen-containing organic polyphosphonate, which is a cathodic corrosion inhibitor. Compared with inorganic polyphosphates, EDTMPS has 3-5 times higher corrosion inhibition rate. It can be miscible with water, non-toxic and pollution-free, good chemical stability and temperature resistance, and still has good scale inhibition effect at 200℃. In aqueous solution, EDTMPS can dissociate into 8 positive and negative ions, so it can chelate with multiple metal ions to form multiple monomer structure macromolecular network complexes, which are loosely dispersed in water, so that the normal crystallization of calcium scale is destroyed, and EDTMPs has a good scale inhibition effect on calcium sulfate and barium sulfate scale.

EDTMPS is used as corrosion and scale inhibitor for circulating water and boiler water, complexing agent for cyanide-free electroplating, chelating agent and oxygen bleaching stabilizer for textile printing and dyeing industry.

2. Technical indicators meet HG/T 3538-2011
Item pointer
Pale yellow to yellow transparent liquid
Active component (measured by EDTMPS) % ≥30.0
Organic phosphine (PO43-) % ≥10.0
Phosphorous acid (measured in PO33-) % ≤3.0
Phosphoric acid (as PO43-) % ≤1.0
Chloride (Cl-) % ≤2.0
Density (20℃) g/cm3 ≥1.25
pH value (1% aqueous solution) 9.5-10.5

3.Use method
When EDTMPS is added separately in circulating cooling water, the general dose is 2-10mg/L. The combination of EDTMPS and HPMA in 1:3 ratio can be used for water treatment in low-pressure boilers. EDTMPS can also be used in combination with BTA, PAAS, zinc salts, etc.

4.Packaging and storage
EDTMPS is packed in plastic drums, 25kg or 250kg per barrel, or stored in a cool indoor place according to user requirements, storage period of 12 months.

5. Security protection
EDTMPS is weakly alkaline, pay attention to labor protection during operation, should avoid contact with skin, eyes, etc., should immediately rinse with plenty of water after contact.

Package&Shipping

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