标题：2809-21-4
中文
基本资料中文名称：羟基乙叉二膦酸 HEDP
英文名称：1-Hydroxy Ethylidene-1,1-Diphosphonic Acid[1]
【CAS】 2809-21-4 别名：羟基亚乙基二膦酸 Dequest:2010 分子式：C2H8O7P2 相对分子质量：206.02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。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 60.089.0亚磷酸（以PO3计）% ≤2.0 2.00.80磷酸（以PO4计）% ≤0.8 0.80.50氯化物 （以Cl计）% ≤0.01 0.010.01pH值（1% 水溶液） ≤2.0 2.02.0密度（20℃）g/cm ≥1.34 1.40——钙螯合值mg/g ≥450 500——铁(以Fe计)含量mg/L ≤10 105.0活性组份（以HEDP·H2O计） % ≥——98.0使用范围与方法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1~10mg/L，作缓蚀剂一般使用浓度10~50mg/L；作清洗剂一般使用浓度1000~2000mg/L；通常与聚羧酸型阻垢分散剂复配使用。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。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。[2]产品推荐有机膦液体系列阻垢缓蚀剂
氨基三甲叉膦酸 ATMP
6419-19-8
羟基乙叉二膦酸 HEDP
2809-21-4
乙二胺四甲叉膦酸钠 EDTMPS
1429-50-1
二乙烯三胺五甲叉膦酸 DTPMPA
15827-60-8
2-膦酸丁烷-1,2,4-三羧酸 PBTCA
37971-36-1
多元醇磷酸酯 PAPE
​2-羟基膦酰基乙酸 HPAA
23783-26-8
双1,6-亚己基三胺五甲叉膦酸 BHMTPMPA
34690-00-1
膦酰基羧酸共聚物 POCA
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English
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(HEDP)
CAS :2809-21-4Molecular Formula:C2H8O7P2 Molecular weight: 206.02PropertiesHEDP 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. Under250C HEDP shows excellent scale and corrosion inhibition ability. HEDP 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 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 and freezing districts. it is quite suitable for using as cleaning agent in electronic fields and as additives in daily chemicals.SpecificationITEMSIndexAppearanceColorless or light yellow transparent liquidWhite crystal powderActive content (as HEDP) % ≥50.060.089.0Phosphorous acid (as PO3)%≤2.02.00.80Phosphoric acid(asPO4 )% ≤0.80.80.50Chloride (as Cl)% ≤1.01.00.10pH (1% solution) ≤222.0Density(20C)g/cm≥1.341.40——Fe ion ppm ≤10 105.0ApplicationHEDP is widely used in the in circulating cool water system of electric power, 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-fixing 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.StorageHEDP 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.SafetyHEDP is Acidity, Avoid contact with eye and skin, once contacted, flush with water.[1]correlationOrganic phosphonate liquid series corrosion inhibition
Ethylene Diamine Tetra SodiumI(EDTMPS)
1429-50-1
Diethylene Triamine Penta (DTPMPA)
15827-60-8
2 - Phosphonobutane - 1,2,4 - tricarboxylic acid(PBTCA)
37971-36-1
Polyhydric alcohol phosphate ester(PAPE)
​2-Hydroxyphosphonocarboxylic Acid(HPAA)
23783-26-8
Bis(Hexamethylene Triamine Penta)( BHMTPMPA)
34690-00-1
Amino Trimethylene Phosphonic Acid(ATMP)
6419-19-8
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(HEDP)
2809-21-4