2809-21-4

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分子式：C2H8O7P2 相對分子質量：206.02

HEDP在250℃下仍能起到良好的緩蝕阻垢作用，在高pH值下仍很穩定，不易水解，一般光熱條件下不易分解。耐酸鹼性、耐氯氧化性能較其它有機磷酸（鹽）好。HEDP可與水中金屬離子，尤其是鈣離子形成六圓環螯合物，因而HEDP具較好的阻垢效果並具明顯的溶限效應，當和其它水處理劑複合使用時，表現出理想的協同效應。

HEDP固體屬於高純產品，適用於冬季嚴寒地區；特別適用於電子行業的清洗劑和日用化學品添加劑。

符合HG/T 3537-1999

HEDP廣泛應用於電力、化工、冶金、化肥等工業循環冷卻水系統及中、低壓鍋爐、油田注水及輸油管線的阻垢和緩蝕；HEDP在輕紡工業中，可以作金屬和非金屬的清洗劑，漂染工業的過氧化物穩定劑和固色劑，無氰電鍍工業的絡合劑。HEDP作阻垢劑一般使用濃度1~10mg/L，作緩蝕劑一般使用濃度10~50mg/L；作清洗劑一般使用濃度1000~2000mg/L；通常與聚羧酸型阻垢分散劑復配使用。

HEDP液體用塑料桶包裝，每桶30Kg或250Kg；HEDP固體用內襯聚乙烯袋的塑料編織袋包裝，每袋淨重25kg，也可根據用户需要確定。貯於室內陰涼通風處，防潮，貯存期十個月。

HEDP為酸性，應避免與眼睛、皮膚接觸，一旦濺到身上，應立即用大量清水沖洗。 ^[2] 

1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(HEDP)

CAS :2809-21-4

Molecular Formula:C2H8O7P2 Molecular weight: 206.02

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. 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.

HEDP 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.

HEDP 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.

HEDP is Acidity, Avoid contact with eye and skin, once contacted, flush with water. ^[1]