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1、此信息来自东涛化工 参考：www.dt- www.dong- 羟基乙叉二膦酸 HEDP 英文名称：1-Hydroxy Ethylidene-1,1-Diphosphonic Acid【CAS】 2809-21-4 别名：羟基亚乙基二膦酸 Dequest:2010 分子式：C 2H8O7P2 相对分子质量：206.021、产品特性：HEDP是一种有机磷酸类阻垢缓蚀剂，能与铁、铜、锌等多种金属离子形成稳定的络合物，能溶解金属表面的氧化物。HEDP 在250下仍能起到良好的缓蚀阻垢作用，在高 pH值下仍很稳定，不易水解，一般光热条件下不易分解。耐酸碱性、耐氯氧化性能较其它有机磷酸（盐）好。HEDP
2、 可与水中金属离子，尤其是钙离子形成六圆环螯合物，因而 HEDP具较好的阻垢效果并具明显的溶限效应，当和其它水处理剂复合使用时，表现出理想的协同效应。HEDP固体属于高纯产品，适用于冬季严寒地区；特别适用于电子行业的清洗剂和日用化学品添加剂。2、HEDP 质量指标 符合 HG/T 3537-1999项 目 指 标外 观 无色或淡黄色透明液体 白色粉末状固体活性组分（以 HEDP计）% 50.0 60.0 89.0亚磷酸（以 PO33-计）% 2.0 2.0 0.80磷酸（以 PO43-计）% 0.8 0.8 0.50氯化物 （以 Cl-计）% 0.01 0.01 0.01pH值（1% 水溶液）
3、 2.0 2.0 2.0密度（20）g/cm 3 1.34 1.40 钙螯合值 mg/g 450 500 铁(以 Fe2+计)含量 mg/L 10 10 5.0活性组份（以 HEDPH2O计）% 98.03、HEDP 应用范围与使用方法：此信息来自东涛化工 参考：www.dt- www.dong- HEDP广泛应用于电力、化工、冶金、化肥等工业循环冷却水系统及中、低压锅炉、油田注水及输油管线的阻垢和缓蚀；HEDP 在轻纺工业中，可以作金属和非金属的清洗剂，漂染工业的过氧化物稳定剂和固色剂，无氰电镀工业的络合剂。HEDP 作阻垢剂一般使用浓度110mg/L，作缓蚀剂一般使用浓度1050mg/L
4、；作清洗剂一般使用浓度10002000mg/L；通常与聚羧酸型阻垢分散剂复配使用。4、HEDP 包装与贮存：HEDP液体用塑料桶包装，每桶30Kg 或250Kg；HEDP 固体用内衬聚乙烯袋的塑料编织袋包装，每袋净重25kg，也可根据用户需要确定。贮于室内阴凉通风处，防潮，贮存期十个月。 5、HEDP 安全防护：HEDP为酸性，应避免与眼睛、皮肤接触，一旦溅到身上，应立即用大量清水冲洗。1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(HEDP)CAS :2809-21-4Molecular Formula:C2H8O7P2 Molecular weight
5、: 206.021, PropertiesHEDP 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 metalssurfaces. Under250OC HEDP shows excellent scale and corrosion inhibition ability. HEDP
6、 has good chemical stability under high pH value, hard to be hydrolyzed, and hard to be decomposed under ordinary light and heat conditions. Its acid/alkali and chlorine oxidation tolerance are better than that of other organophosphoric acids (salt). HEDP can react with metal ions in water system to
7、 form hexa-element chelating complex, with calcium ion in particular. Therefore, HEDP has good antiscale and visible threshold effects. When built together with other water treatment chemicals, it shows good synergistic effects.The solid of HEDP is high purity product, suitable for using in winter a
8、nd freezing districts. it is quite suitable for using as cleaning agent in electronic fields and as additives in daily chemicals.2, Specification:ITEMS IndexAppearance Colorless or light yellow transparent liquid White crystal powderActive content (as HEDP) % 50.060.0 89.0Phosphorous acid (as PO33-)
9、% 2.02.0 0.80Phosphoric acid(asPO43- )% 0.80.8 0.50Chloride (as Cl-)% 1.01.0 0.10pH (1% solution) 22 2.0Density(20OC)g/cm3 1.341.40 Fe ion ppm 10 10 5.0此信息来自东涛化工 参考：www.dt- www.dong- 3,HEDP Application range&using methodHEDP is widely used in the in circulating cool water system of electric power,
10、chemical industry, metallurgy, fertilizer, etc. and widely used as a scale and corrosion inhibitor of low-pressure boilers, field waterflood, oil pipeline.In light&textile industry, HEDP is used as detergent for metal and nonmetal. In dyeing industry, HEDP is used as peroxide stabilizer and dye-fixi
11、ng agent; In non-cyanide electroplating, HEDP is used as chelating agent. The dosage of 1-10mg/L is preferred as scale inhibitor, 10-50mg/L as corrosion inhibitor, and 1000-2000mg/L as detergent. Usually, HEDP is used together with polycarboxylic acid.4,Package and Storage:ATMP liquid: Normally In 30kg or 250kg net Plastic Drum;ATMP solid: 25kg inner liner polyethylene (PE) bag, outer plastic woven bag, or confirmed by clients request.Storage for ten months in room shady and dry place.5,Safety Protection:HEDP is Acidity, Avoid contact with eye and skin, once contacted, flush with water.
