Water Treatment Chemicals 1-Hydroxy Ethylidene-1, 1-Diphosphonic Acid HEDP CAS 2809-21-4

• Customization: Available
• CAS No.: 2809-21-4
• Formula: C2h8o7p2
• Model NO.: liquid
• Appearance: Liquid
• Hazardclass: 8
• Un: 3265
• MOQ: 1X20′container
• Customized: Non-Customized
• Transport Package: in Drums
• Specification: liquid
• Trademark: GW
• Origin: China
• Production Capacity: 8000mt/Year

Product Description

1-Hydroxy Ethylidene-1,1-Diphosphonic Acid 
(HEDP)

CAS No.  2809-21-4 
Molecular Formula:   C₂H₈O₇P₂               
Molecular weight: 206.02

Properties:

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. HEDPshows excellent scale and corrosion inhibition effects under temperature 250ºC. 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.
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.  

Specification:

Items	Index
Appearance	Clear, Colorless to pale yellow aqueous solution	White crystal powder
Active content (HEDP)%	58.0-62.0	90.0 min
Active content (HEDP·H2O)%	-	98.0 min
Phosphorous acid (as PO3^3-^)%	2.0 max	0.8 max
Phosphoric acid  (as PO4^3- )%	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  (20ºC)g/cm^3	1.40 min	-
Fe, mg/L	20.0 max	10.0 max
Ca sequestration (mg CaCO3/g)	500.0 min

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. 

Package and Storage:

HEDP liquid: 200L plastic drum,IBC(1000L),customers' requirement.
HEDP solid: 25kg/bag,customers' requirement.
Storage for twelve months in room shady and dry place.

Safety Protection:

Acidity, Avoid contact with eye and skin, once contacted, flush with water.

Synonyms:

HEDP;HEDP(A);HEDPA;
Etidronic Acid;
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid; 
Hydroxyethylidene-1,1-diphosphonicacid(HEDP); 
1-Hydroxyethylidenediphosphonic Acid;
Hydroxyethylidene Diphosphonic acid(HEDP);
1-Hydroxy-1,1-Ethanediyl ester;
Oxyethylidenediphosphonic Acid(OEDP)
Оксиэтилидендифосфоновая кислота(ОЭДФ -кислота )

 

1. Top quality materials with competitive price;
2. Large capacity of stable materials supply;
3. Safety and fast shipment by express/air/sea;
4. Sample order acceptable;
5. Professional and great packing as customized;
6. Convenient payment terms by T/T, Paypal, Western Union, Alibaba and others;
7. Reply inquiries in time


Wuhan Golden Wing Industry & Trade Co., Ltd was founded in 2000, we are a professional supplier of Mainly four categories of products including Industrial & fine chemicals, APIs, Reagent & Lab Supplies, and Food & Food Additives. Our products are widely used in Food & Beverage industry, Chemical industry, and Pharmacy industries. 
 We have established stable business relationship with more than thirty countries and regions all over of the world. The main countries and regions are: Singapore, South Korea, Burma, Indonesia, Malaysia, Bangladesh, Saudi Arabia, Israel, South Africa, Kenya, Latvia, U.K., Germany, Czech, Switzerland, Norway, Iceland, Ethiopia, USA, Canada, Brazil, Chile, New Zealand, Australia, etc. 
We are a professional and experienced team and we promise clients to provide the best quality, price and service. Besides, in the business cooperation with clients, we still abide by principle of equality and mutual benefit, deeply trusted and recognized by clients. 
If you are interested in our company and our products, please feel free to contact us directly for more information. We look forward to cooperating with you in the near future.


Q: Do you supply free samples? 
A: Yes, generally we could provide free sample, but the shipping cost should be paid by customers. 

Q: How can we contact you?
A: You could feel free to send the inquiry through Made-China about the material you are interested.

Q: Which payment terms do you accept?
A: We could accept the payment through T/T, L/C and Online payment.
 
Q: Can I pay with a credit card
A: Yes, you could feel free to make your payment through credit card.
 
Q: Do you accept third party inspection?
A: Yes.we do

Q: When I could receive my material when payment made
A: Generally we could ship out within 3-5 working days after your payment confirmation. The delivery time would be different for different countries and different shipping method.