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）％
|
30.0min |
|
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 (as 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
ETDMP:HPMA=1:3, it can be used for low
pressure boiler. It can also be built with
BTA, PAAS and zinc salt.
Package and Storage:
Normally In 250kg net
Plastic Drum, IBC drum can also be used as
required. Storage for ten months in room
shady and dry place.
