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羟基亚乙基二膦酸

Hydroxy Ethylidene Diphosphonic Acid（HEDP）
2809-21-4
湖北 更新日期：2011-07-11

Cnhile Group

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中文名称：
羟基亚乙基二膦酸
英文名称：
Hydroxy Ethylidene Diphosphonic Acid（HEDP）
CAS号：
2809-21-4
Hydroxy Ethylidene Diphosphonic Acid（HEDP）
CODE: LH-101                           【CAS】 2809-21-4
Alias: 1-Hydroxy Ethidene -1,1-Diphosphonic Acid   Dequest:2010
Molecular Formula:    C2H8O7P2                Molecular weight: 206.03
Structure:
 
Properties

HEDP is an organophosphoric acid corrosion inhibitor. It can chelate with Fe, Cu, and Zn etc. metal ions and form stable complex compound. It can dissolve the oxidized materials on these metals’ surfaces. HEDP has good chemical stability under high pH value, hard to be hydrolyzed, and hard to be decomposed under ordinary light and heat conditions. HEDP can react with metal ions in water system to form hexa-element chelating complex, with calcium ion in particular. Therefore, HEDP has good antiscale and visible threshold effects.

Safety Protection:

Acidity, Avoid contact with eye and skin, once contacted, flush with water.

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Items
HEDP
Appearance
Colorless or light yellow transparent liquid
Active content（HEDP）％     
60.0min
Phosphorous acid（as PO33-）% 
2.0 max
Phosphoric acid （asPO43 ）%  
0.8 max
Chloride  (as Cl-)%     
0.5 max
Sequestrant value(CaCO3)mg/g
500 max
pH（1％ solution）      
2.0 max
Density （20℃）g/cm3
1.44 min
Iron, as Fe (ppm)
10 max
Colour APHA (Hazen)
80 max
Storage for ten months in room shady and dry place.
HEDP, water treatment chemicals, water treatment agents

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