Hope HEDP
Chemical Name: Hydroxyethylene diphosphonic acid
Molecular Formula: C2H8O7P2
Molecular Weight: 206.03
CAS NO. : 2809-21-4
Specification:
Item | Standard | ||
Appearance | Colorless to light yellow transparent liquid | White crystalline powder | |
Active Ingredients (HEDP), % | ≥ 50.0 | ≥ 60.0 | ≥90.0 |
Phosphorous Acid (PO33-) Content, % | ≤2.0 | ≤2.0 | ≤0.5 |
Chloride (Cl-) Content, % | ≤ 200 | ≤ 200 | ≤ 50 |
Density(20℃), g/cm3 | ≥ 1.360 | ≥ 1.440 | — — |
PH (1% Water Solution) | 1.5-2.0 | ≤2.0 | ≤2.0 |
Iron (Fe2+) Content, ppm | ≤ 10.0 | ≤ 10.0 | ≤ 10 |
Calcium Chelation Value, mgCaCO3/g | ≥450 | ≥ 500 | — — |
Phosphoric Acid (PO43-) Content, % | ≤0.8 | ≤0.8 | ≤0.3 |
Chrominance, Hazen | ≤ 50 | ≤ 50 | — — |
Active Ingredients (HEDP· H2O), % | — — | — — | ≥98.0 |
Note: Low arsenic index is AS content≤3.0ppm
Performance:
HEDP can be miscible with water and remains stable at high PH environment. HEDP has good scale inhibition effect below 200℃, while it is easy to decompose above 250℃. HEDP is toxicity and pollution-free, and also is acid and alkali resistant. HEDP can form stable complexes with various metal ions such as iron, copper, aluminum, and zinc, and can dissolve metal surface oxides.
Application:
HEDP can be a scale and corrosion inhibitor for boilers and heat exchangers, a complexing agent for cyanide free electroplating, a cleaning agent for metals and non-metals, a stabilizer and fixing agent in the rinsing industry, and a scale inhibitor and dispersant for circulating water systems.
Packaging and storage:
The liquid HEDP is packaged in plastic drums of 25kg or 250kg; the solid HEDP is packaged in plastic woven bags (lined with polyethylene bags), with a net weight of 25kg per bag that can also be determined according to customers’needs. Storage should be in a cool and ventilated indoor space. Keeping away from moisture and sunlight. Storage period is ten months.
Safety protection:
HEDP is acidic and should avoid contacting with eyes, skin, or clothing. Once splashed onto the body, it should be immediately rinsed with plenty of water.
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