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Liquid / Solid Water Purifying Agents In Circulating Cool Water System
Product Details:
| Place of Origin: | China |
| Brand Name: | B&W |
| Certification: | ISO 9001:2008 ISO 14001:2004 |
| Model Number: | HEDP |
Payment & Shipping Terms:
| Minimum Order Quantity: | As Need |
|---|---|
| Price: | Negotiable |
| Packaging Details: | In plastic drum or PP bag |
| Delivery Time: | 2 Weeks |
| Payment Terms: | T/T, L/C |
| Supply Ability: | 5000 MT |
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Detail Information |
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| Molecular Formula: | C2H8O7P2 | Molecular Weight: | 206.02 |
|---|---|---|---|
| Appearance: | Colorless Or Light Yellow Transparent Liquid | CAS No.: | 2809-21-4 |
| Hazard Class: | 3265 | UN No.: | 8 |
| High Light: | water purification chemicals,water purification liquid |
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Product Description
Liquid / Solid Water Purifying Agents In Circulating Cool Water System
1 - Hydroxy Ethylidene - 1, 1 - Diphosphonic Acid HEDP Water Purifying Agents Liquid Or Solid Corrosion Inhibitor
Description
Commodity: 1 - Hydroxy Ethylidene - 1, 1 - Diphosphonic Acid, HEDP
Appearance: Colorless or light yellow transparent liquid, White crystal powder
Molecular Formula: C2H8O7P2
Molecular Weight: 206.02
CAS No.: 2809-21-4
Class: 8
UN No.: 3265
Package and Storage
Liquid: Normally 250kg net in drum, IBC, or per customers.
Solid: 25kg in inner liner polyethylene (PE) bag, outer plastic woven bag, or confirmed by clients.
Storage for ten months in room shady and dry place.
Specification
| Items | Index | |
| Appearance | Colorless or light yellow transparent liquid | White crystal powder |
| Active content (HEDP) % | 58.0-62.0 | 90 min |
| Phosphoric acid (asPO43- ) % | 0.8 max | 0.5 max |
| Phosphorous acid (as PO33-)% | 2.0 max | 0.8 max |
| Chloride (as Cl-)% | 0.01 max | 0.01 max |
| Density (20℃) g/cm3 | 1.40 | — |
| pH (1% solution) | 2 max | 2 max |
| Fe ion ppm | 10 max | 5 max |
| Colour APHA (Hazen) | 30 max | — |
Properties
The solid state of HEDP is crystal powder, suitable for usage in winter and freezing districts. Because of its high purity, it can be used as cleaning agent in electronic fields and as additives in daily chemicals.
HEDP is an organophosphoric acid corrosion inhibitor. It can chelate with Fe, Cu, and Zn ions to form stable chelating compounds.It can dissolve the oxidized materials on these metals’ surfaces. HEDP shows excellent scale and corrosion inhibition effects under temperature 250℃. 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.
Usage
HEDP is used as scale and corrosion inhibition in circulating cool water system, oil field and low-pressure boilers in fields such as electric power, chemical industry, metallurgy, fertilizer, etc.. In light woven 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.
Safety Protection
Acidity, Avoid contact with eye and skin, once contacted, flush with water immediately.
