|Place of Origin:||China|
|Model Number:||HEDP acid 98%|
|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|
|Name:||1-Hydroxyethylidene-1,1-diphosphonic Acid HEDPA|
swimming pool algaecide,
water treatment biocide
Metal and non-metal cleaning agents cas 2809-21-4 1-Hydroxyethylidene-1,1-diphosphonic acid HEDPA
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 organic phosphoric acid corrosion inhibitor. It can chelate with iron, copper and zinc ions to form stable chelating compounds. It can dissolve oxidized substances on these metal surfaces. HEDP exhibits excellent scale and corrosion inhibition at a temperature of 250 ° C. HEDP has good chemical stability at high pH and is not easily hydrolyzed or decomposed under normal light and heating conditions. Its acid / alkali and chlorine oxidation resistance is better than other organic phosphoric acids (salts). HEDP can react with metal ions in water systems to form six-membered chelate complexes, especially calcium ions. Therefore, HEDP has good anti-scaling and visible threshold effects. When used with other water treatment chemicals, it has a good synergy.
The solid state of HEDP is crystalline powder, suitable for use in winter and frozen areas. Due to its high purity, it can be used as a cleaning agent in the electronics field and an additive for 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.