|Place of Origin:||China|
|Minimum Order Quantity:||1MTS|
|Delivery Time:||30-45 days|
|Payment Terms:||L/C, D/A, D/P, T/T, Western Union, MoneyGram|
|Supply Ability:||2000MTS per month|
|Molecular Structure:||C2H8O7P2||Synonyms:||HEDP; HEDPA|
|Hazard Class:||8||HS Code:||2942000000|
CAS 2809-21-4 Cooling Tower Water Treatment 60% Etidronic acid Hedp
Product Name: 1-Hydroxyethylidene-1,1-diphosphonic acid
Synonyms: HEDP; HEDPA
CAS NO: 2809-21-4
Molecular Structure: C2H8O7P2
Min Order Qty: 1MTS
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(HEDP)
|Appearance||Clear, Colorless to a pale yellow aqueous solution||White crystal powder|
|Active content (HEDP)%||60.0 min||90.0 min|
|Active content (HEDP·H2O) %||-||98.0 min|
|Phosphorous acid (as PO33-) %||2.0 max||0.8 max|
|Phosphoric acid (as PO43- )%||0.8 max||0.5 max|
|Chloride (as Cl-) %||0.02 max||0.01 max|
|pH (1% water solution)||2.0 max||2.0 max|
|Density (20℃)g/cm3||1.40 min||-|
|Fe, mg/L||20.0 max||10.0 max|
|Ca sequestration (mg CaCO3/g)||500.0 min|
HEDP is an organophosphorus 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 the 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. It's acid/alkali and chlorine oxidation tolerance are better than that of other organophosphorus acids (salt). HEDP can react with metal ions in the water system to form a 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-state of HEDP is crystal powder, suitable for usage in winter and freezing districts. Because of its high purity, it can be used as a cleaning agent in electronic fields and as additives in daily chemicals.
1. It can be used in cooling water systems, pipelines, and boiler scale, it can
be as high hardness, high salinity, and another water quality is poor oil pipeline
2. It can be used for cooling water, boiler water, oilfield water treatment scale
inhibitor and corrosion inhibitor.
3. It can be used for circulating cooling thermal power plants, refineries.
1. What are your payment terms?
T/T, D/P, L/C, D/A, O/A, Paypal, Alipay, and Western Union
2. What's your delivery time?
Usually, shipment will be made within 7-15 days against confirmed order.
3. How about the validity of the offer?
Usually, our offer is valid for 1 week. However, validity might vary between different products.
4. What documents do you provide?
Usually, we provide a Commerical Invoice, Packing List, Bill of loading, COA, Health certificate and Origin of the certificate. Please let us know if you need additional documents.
5. What is the loading port?
ShangHai, TianJin, HuangPu, Qingdao, etc.