(1-Hydroxyethylidene)bis-phosphonic acid tetrasodium salt
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Product Description
(1-Hydroxyethylidene)bis-phosphonic acid tetrasodium salt (HEDP•Na4 )
HEDP•Na4 is the sodium salt of HEDP, 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.
HEDP•Na4 is even granule with excellent fluidity, low dust content, low hygroscopicity and easy handling properties.
HEDP•Na4 is a powerful chelating agent. As a household cleaning agent and industrial cleaner auxiliary, HEDP·Na4 can stabilize metal ions in water and enhance effect of decontamination under high pH washing condition.
HEDP•Na4 can be used in cosmetics and personal care to restrain rancidity and discoloration.
HEDP•Na4 can be used as slow-release scale corrosion inhibitor after being compressed into tablets with other auxiliaries. HEDP•Na4 works as oxygen bleaching stabilizer in dyeing and paper making industry.
Specification of Product
Product Name : (1-Hydroxyethylidene)bis-phosphonic acid tetrasodium salt
HEDP•Na4
Tetrasodium etidronate
CAS No.: 3794-83-0 (4-Na)
CAS No.: 29329-71-3 (x-Na)
Molecular Formula: C2H4O7P2Na4
Molecular weight: 294
(1-Hydroxyethylidene)bis-phosphonic acid tetrasodium salt Quality Standard:
Liquid Powder Granule
Appearance Colorless to yellowish transparent liquid White powder White granule
Active content (HEDP)% 20.3-21.7 60.0 min 57.0-63.0
Active content (HEDP•Na4)% 29.0-31.0 85.0 min 81.0-90.0
Total phosphoric acid (as PO43-) % 18.4-20.4 55.0 min --
Fe, mg/L 20.0 max 35.0 max 20.0 max
Moisture, % -- 10.0 max 10.0 max
Density (20℃) g/cm3 1.26-1.36 -- --
PH (1% water solution) 10.0-12.0 11.0-12.0 11.0-12.0
Bulk density(20℃), g/cm3 -- -- 0.70-1.10
Particle Size Distribution(＜250μm), % -- -- 4.0 max
Particle Size Distribution(＞800μm), % -- -- 5.0 max
Packing
Liquid: 200L plastic drum, IBC(1000L), customers' requirement.
Powder: 25kg/bag
Granule is film lined kraft valve bag, with net weight 25kg/ bag, 1000kg/ tonnage bag
Storage
Storage for 10 months in room shady and dry place.
Avoid contact with eye and skin. Goggles and rubber gloves should be used at all times while handling the product.
(1-Hydroxyethylidene)bis-phosphonic acid tetrasodium salt Usage
The dosage of HEDP·Na4 is around 1.0-5.0% when used as chelating agent in cleaning industry. It works better when combined with polyacrylate sodium, copolymer of maleic and acrylic acid.