CAS No. 1429-50-1
Molecular Formula:
C6H12O12N2P4Na8
Molecular weight: 612.13
Structural Formula:
Properties:
EDTMPS
is nitrogenous organic polyphosphonic acid, a part of
cathodic corrosion inhibitor.Its corrosion inhibition is 3~5
times better than that of inorganic polyphosphate. It can be
fully dissolved in water, innocuous and none pollution to
environment, has good chemical stability and thermal
tolerance. It shows excellent scale inhibition ability under
temperature 200℃. It can dissociate into 8 positive-negative
ions, thus can chelate with many metal ions to form polymer
reticulation complex, to destroy the normal crystallization
of calcium scale. EDTMPS shows better antiscale
effects to calcium sulfate and barium sulfate.
Specification:
| items |
index |
| Appearance |
Clear yellow to umber transparent liquid |
| Active component
(EDTMPS)%
|
28.0min |
| Organic phosphonic
acid (asPO43-
)% |
10.0min |
| 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 |
Usage:
EDTMPS
can be used as corrosion inhibitor in circulating cool water
system and boiler water. It is a chelating agent in
non-cyanogen electroplating industry and a water-softening
agent in printing & dyeing industry. When used alone,
2~10mg/L is preferred. When built with
HPMA by ratio EDTMP:HPMA=1:3, it can be used for low
pressure boiler. It can also be built with BTA,
PAAS and zinc salt.
