基本介紹
- 中文名：羥基乙叉二膦酸四鈉
- 英文名：HEDP·Na4
- 別稱：Tetra sodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid
- 化學式：C2H4O7P2 Na4
- 分子量：294
- CAS登錄號：3794-83-0(4-Na),29329-71-3(x-Na)
- 水溶性：易溶於水
- 外觀：無色至淡黃色液體
- 套用：緩蝕阻垢劑，水處理劑
產品性能,質量指標,使用方法,安全防護,
產品性能
HEDP·Na4為白色粉末固體、易溶於水、不吸潮，方便運輸，適用於嚴寒條件下使用。HEDP·Na4屬於有機膦酸鹽類阻垢緩蝕劑，能與鐵、銅、鋅等多種金屬離子形成穩定的絡合物，能溶解金屬表面的氧化物。在250℃下仍起良好的緩蝕阻垢作用。
HEDP·Na4廣泛套用於電力、化工、冶金、化肥等工業循環冷卻水、低壓鍋爐、油田注水及輸油管線的阻垢和緩蝕；HEDP·Na4在輕紡工業中，可以作金屬和非金屬的清洗劑、印染工業的過氧化物穩定劑和固色劑、無氰電鍍絡合劑、日用化學品添加劑。
質量指標
項 目 | 指 標 | |
外 觀 | 無色至微黃色透明液體 | 白色粉末狀固體 |
活性組分（以HEDP計） % | 20.3-21.7 | ≥56.0 |
活性組份(以 HEDP·Na4計) % | 29.0-31.0 | ≥79.9 |
總磷含量(以 PO4計) % | 18.4-20.4 | ≥52.0 |
鐵(以Fe計)含量 mg/L ≤ | 20 | 35.0 |
乾燥失重 % ≤ | -- | 15 |
密度（20℃）g/cm | 1.26-1.36 | -- |
pH（1%水溶液） | 10.0-12.0 | 11.0-12.0 |
使用方法
HEDP·Na4液體為塑膠桶包裝，每桶30Kg或250Kg；HEDP·Na4固體為塑膠編織袋包裝，每袋淨重25Kg。貯於室內陰涼通風處，防潮，嚴防暴曬，貯存期十個月。
安全防護
HEDP·Na4為鹼性，應避免與眼睛、皮膚接觸，一旦濺到身上，應立即用大量水沖洗。
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CAS No. 29329-71-3 (x-Na), 3794-83-0 (4-Na) Dequest: 2016/2016DG
Molecular Formula: C2H4O7P2Na4 Molecular weight: 294
Properties:
Dequest 2016 is the sodium salt of Dequest 2010, HEDP·Na4 is an good scale inhibitor for calcium carbonate, it can be used in low pressure boiler water system, circulating water system, industrial and municipal cleaning water system and swimming pool.
The solid HEDP·Na4 is white powder, soluble in water, easily deliquescence, suitable for use in winter and freezing districts. It is a kind of organophorphonic acid scale and corrosion inhibitor, can form stable complex with Fe, Cu and Zn ions, it can dissolve the oxides on metal surface, it has good scale and corrosion inhibition effect under 250℃.
HEDP·Na4 is widely used in circulating cool water system, medium and low pressure boiler, oil field water pipelines as scale and corrosion inhibitor in fields such as electric power, chemical industry, metallurgy, fertilizer, etc.. In light woven industry, HEDP·Na4 is used as detergent for metal and nonmetal. In dyeing industry, HEDP·Na4 is used as peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, HEDP·Na4 is used as chelating agent.
Specification:
items | index | |
Appearance | White powder | Colorless |
Active component（HEDP）% | 56.0 min | 20.3-21.7 |
Active compone% | 79.9 min | 29.0-31.0 |
as PO4 % | 52.0-54.0 | 18.4-20.4 |
Fe ppm | 35.0 max | 20 max |
Dry weight loss，% | 15 max | -- |
density（20℃）g/cm3 | -- | 1.26-1.36 |
PH | 11.0-12.0 | 10.0-12.0 (as it) |
Package and Storage:
For liquid: Normally In 250kg net Plastic Drum, IBC drum can also be used as required. For solid: inner liner polyethylene (PE) bag, outer plastic woven bag, or confirmed by clients. Storage for ten months in room shady and dry place.
Safety Protection:
Weak acidity, Avoid contact with eye and skin, once contacted, flush with water.
