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Etidronic Acid CAS#2809-21-4

Etidronic Acid CAS#2809-21-4

Basic Information

Etidronic Acid
HEDP

Etidronic acid, commonly abbreviated HEDP, is an organic phosphonic acid used as a complexing and water-conditioning agent. Its scale-control and corrosion-inhibition functions support circulating cooling water, boilers, oilfield systems, and desalination formulations. Additional applications include electroplating, photographic processes, and detergents where metal-ion management is relevant to formulation performance.

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product description

Chlorine-Free Eco-Friendly Formula:HEDP is a new-generation chlorine-free complexing agent, making it a safer and more environmentally friendly choice for electroplating and water treatment systems.


Excellent Corrosion and Scale Inhibition:It serves as an effective corrosion inhibitor and scale control agent, helping maintain stable water quality in circulating cooling water systems.


Efficient Water Treatment Performance:As a key organic phosphonic acid water treatment chemical, it provides long-lasting conditioning performance for industrial water systems.


Wide Industrial Applicability:Suitable for electroplating, cooling water circulation, and other industrial water treatment processes requiring reliable scale and corrosion control.


Products Description of Etidronic Acid CAS#2809-21-4

HEDP is a chlorine-free electroplating complexing agent and core water stabilizer for circulating cooling water, delivering excellent corrosion and scale inhibition.
As a typical organic polyphosphonic acid water treatment agent alongside ATMP and EDTMP, such chemicals were developed in the late 1960s and widely applied in the 1970s.


Product Application of Etidronic Acid CAS#2809-21-4

1-Hydroxyethylidenebis(phosphonic acid) inhibits protein tyrosine phosphatase and serves photographic uses. It aids bone health and treats osteoporosis and Paget’s disease.
Industrially, it prevents corrosion and scale in cooling water, oilfields, boilers and various industries, and prepares desalination antiscalants. It is also added into detergents, cosmetics and medicines.


Product Specifications

Parameters


Melting point198~199℃
Boiling point578.8±60.0 °C(Predicted)
density1.45 (60% aq.)
vapor pressure0Pa at 25℃
storage temp.Sealed in dry,Room Temperature
solubilityMethanol (Slightly), Water (Slightly)
pka1.35, 2.87, 7.03, 11.3(at 25℃)
formPowder
colorwhite
PHpH (1.7→100, 25℃) : 1.3~1.8
Water SolubilitySoluble in water.
Merck143863
BRN1789291
Stability:Stable. Incompatible with strong oxidizing agents.
InChIKeyDBVJJBKOTRCVKF-UHFFFAOYSA-N
LogP-3.5
CAS DataBase Reference2809-21-4(CAS DataBase Reference)
EPA Substance Registry SystemEtidronic acid (2809-21-4)


Safety Information


Hazard CodesXi,Xn
Risk Statements37/38-41-22
Safety Statements26-39
RIDADRUN 3265
WGK Germany2
RTECSSZ8562100
F10
TSCAYes
HazardClass8
PackingGroupII
HS Code29319090
Hazardous Substances Data2809-21-4(Hazardous Substances Data)
ToxicityLD50 oral in mouse: 1800mg/kg


Factory Showcase
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Shipping And Transportation

Delivery Time

Inventory 2-3 working days New manufacturing 7-10 working days

Mode of Transportation
1. By Air, fast but expensive.
2. By Sea, usual and economy.
3. By Train, suit for middle Asia countries.
4. By Express, suit for small package.
We only provide highest quality goods available, accompanied by after support!

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FAQ

1. What products does Shandong Junzheng Chemical supply?
We supply inorganic chemicals, organic solvents, water treatment chemicals, and surfactants, including calcium chloride, soda ash, sodium bicarbonate, caustic soda, citric acid, ethyl acetate, and SLES. Please contact us to confirm specific product availability.


2. Which industries do your products serve?
Our products serve pharmaceutical, agrochemical, dye, rubber, construction, coal processing, and other chemical industries. Product suitability depends on the required grade, specifications, and application.


3. How can I get a quotation?
Please provide the product name, CAS number, required specifications, quantity, packaging requirements, and destination port. These details help us prepare an accurate quotation.


4. How do you control product quality?
We follow strict quality testing procedures supported by technical personnel, research equipment, and an established management system. Specific quality requirements can be confirmed before placing an order.


5. Can you help me select a suitable chemical?
Yes. Our technical team can assist with product selection based on your application and required specifications. Please share your intended use and key technical requirements.

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