乙二胺四甲叉膦酸鈉（EDTMPS）
Ethylene Diamine Tetra （Methylene Phosphonic Acid）
別名：乙二胺四亞甲基膦酸鈉、乙二胺四亞甲基磷酸、乙二胺四甲叉磷酸
分子式： C6H12O12N2P4Na8 相對分子質量： 612.13
Molecular formula: C6H12O12N2P4Na8 Relative molecular weight: 612.13
CAS No. 1429-50-1
結構式
Structural formula
1、性能 Performance
本品是一種優良的阻垢、緩蝕劑，熱穩定性較好，對碳酸鹽防垢效果高，對碳鋼、銅都有一定的緩蝕能力，若與其他水處理劑配合使用，效果更好，本品的阻垢和緩蝕能力在高溫時，優於ATMP，對BaSO4阻垢效果優良。
EDTMPS is a good scale and corrosion inhibitor with good thermal stability. It has good anti-scale effects to carbonates, as well as certain corrosion inhibition ability on carbon steel and copper. When it is used together with other water treatment agents, the effect comes out even better. Under high temperature, EDTMPS has better performances of scale and corrosion inhibition than ATMP, and excellent anti-scale effect on BaSO4.
2、用途 Usage
本品廣泛用于電力、化學、冶金、化肥、輕工等循環水系統的阻垢和緩蝕。
EDTMPS is widely used for corrosion and scale inhibitions in circulating water treatment in fields of power plant, chemical industry, metallurgy, fertilizer and light industry, etc.
3、質量指標 Quality index
外觀：棕黃色透明液體
Appearance: Reddish brown transparent liquid
| 項目名稱 Item name | 指標 Index |
| 優等品 Premium | 一等品 First rate | 合格品 Qualified |
| 活性組分（以鈉鹽計）含量 % Active component （as sodium salt） % | 28--30 | 28--30 | 28--30 |
| 有機磷（以P計）% ≥ Organic phosphorus （as P） % ≥ | 4.5 | 4.0 | 3.3 |
| 亞磷酸（以PO33-計）％ ≤ Phosphorous acid （as PO33-） % ≤ | 1.0 | 2.0 | 5.0 |
| 磷酸（以PO43-計）％ ≤ Phosphoric acid （PO43-） % ≤ | 0.5 | 1.0 | 2.0 |
| 氯化物（以CI-計）％ ≤ Chloride （as Cl-）: % ≤ | 2.0 | 4.0 | 6.0 |
| 乙二胺含量% ≤ Ethylene diamine % ≤ | 0.012 | 0.050 | 0.080 |
| PH值（1％水溶液） ≤ Ph value （1% water solution） ≤ | 9.5-10.5 | 9.5-10.5 | 9.5-10.5 |
| 密度：（20℃）g/cm3 ≥ Density: （20℃） g/cm3 ≥ | 1.3-1.4 | 1.3-1.4 | 1.3-1.4 |
4、使用方法 Usage
本品在循環冷卻水中單獨投加時，一般劑量2～10ppm，與HPMA按1：3比例復配后，可用于低壓鍋爐內水處理，也可與BTA，PAAS，鋅鹽等復配使用。
When used alone in the circulating cooling water, the dosage 2~10ppm 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.
5、包裝與貯存 Packing and storage
本品采用聚乙烯塑料桶包裝，每桶凈重25kg，或采用內襯聚乙烯塑料薄膜的鐵桶包裝，每桶凈重200kg，運輸時防止曝曬，貯存在干燥通風的庫房內，貯存期10個月。
Pack in 25kg net polyethylene （PE） plastic drum, or in 200kg net iron bucket with polyethylene （PE） inner-lining. Avoid insolation during transportation. Be stored for ten months in room ventilated and dry place
