EDTMPSEthylene Diamine Tetra (Methylene Phosphonic Acid) Sodium (EDTMPS)CAS No. 1429-50-1 Molecular Formula: C6H12O12N2P4Na8 Molecular weight: 612.13
一、产品性能EDTMPS是含氮有机多元膦酸，属阴极型缓蚀剂，与无机聚磷酸盐相比，缓蚀率高3～5倍。能与水混溶，无毒无污染，化学稳定性及耐温性好，在200℃下仍有良好的阻垢效果。EDTMPS在水溶液中能离解成8个正负离子，因而可以与多个金属离子螯合，形成多个单体结构大分子网状络合物，松散地分散于水中，使钙垢正常结晶被破坏。EDTMPS对硫酸钙、硫酸钡垢的阻垢效果好。二、质量指标符合HG/T 3538-2003
项 目
指 标
外 观
黄棕色透明液体
活性组分 (以EDTMPS计)%
≥
30.0
有机膦（以PO4 计）%
≥
10.0
亚磷酸（以PO3计）%
≤
5.0
磷酸（以PO4计）%
≤
1.0
pH（1%水溶液）
9.5～10.5
密度(20℃) g/cm
≥
1.25
氯化物（以Cl计）%
≤
3.0
三、应用范围与使用方法EDTMPS用于循环水和锅炉水的缓蚀阻垢剂、无氰电镀的络合剂、纺织印染行业螯合剂和氧漂稳定剂。在循环冷却水中单独投加时，一般剂量2～10mg/L。EDTMPS与HPMA按1:3比例复配后，可用于低压锅炉炉内水处理。EDTMPS也可与BTA、PAAS、锌盐等复配使用。
四、包装与贮存
EDTMPS用塑料桶包装, 每桶25kg或根据用户需要确定。贮于室内阴凉处，贮存期十个月。
---------------------------------------------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 (as PO4) ％
10.0min
Phosphorous acid（as PO3）%
5.0max
Phosphoric acid （asPO4）%
1.0max
Ph （1％ water solution）
9.5-10.5
Density （20℃）g/cm
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 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
