Etidronic Acid
Effective Water Quality Maintenance: HEDP functions as an efficient scale and corrosion inhibitor in recirculating cooling water systems, contributing to long-term water quality stability.
Chlorine-Free Composition: As a chlorine-free chelating agent, it provides an environmentally sustainable alternative to conventional water treatment chemicals.
Stable and Reliable Performance: The compound exhibits high thermal and chemical stability, resisting decomposition under typical operational conditions to ensure sustained efficacy.
Versatile Industrial Applications: As a member of the organic phosphonic acid-based water treatment agents, HEDP is suitable for diverse industrial processes and water conditioning systems.
Hydroxyethylidene diphosphonic acid (HEDP) is an advanced chlorine-free complexing agent widely employed in electroplating and water treatment applications. Its primary function involves maintaining water quality stability in circulating cooling systems through effective corrosion and scale inhibition. This compound belongs to the category of organic phosphonic acid-based water treatment agents.
Other domestically produced agents in this class include aminotrimethylenephosphonic acid (ATMP, structural formula [CH2PO(OH)2]3N) and ethylenediaminetetramethylenephosphonic acid (EDTMP). Organic polyphosphonic acids gained recognition as a novel category of water treatment chemicals during the late 1960s and became established as effective solutions for industrial applications by the 1970s.
Etidronic Acid Chemical Properties
Melting point | 198~199℃ |
Boiling point | 578.8±60.0 °C(Predicted) |
density | 1.45 (60% aq.) |
vapor pressure | 0Pa at 25℃ |
storage temp. | Sealed in dry,Room Temperature |
solubility | Methanol (Slightly), Water (Slightly) |
pka | 1.35, 2.87, 7.03, 11.3(at 25℃) |
form | |
color | white |
PH | pH (1.7→100, 25℃) : 1.3～1.8 |
Water Solubility | Soluble in water. |
Merck | 14,3863 |
BRN | 1789291 |
Stability: | Stable. Incompatible with strong oxidizing agents. |
InChIKey | DBVJJBKOTRCVKF-UHFFFAOYSA-N |
LogP | -3.5 |
CAS DataBase Reference | 2809-21-4(CAS DataBase Reference) |
EPA Substance Registry System | Etidronic acid (2809-21-4) |
Safety Information
Hazard Codes | Xi,Xn |
Risk Statements | 37/38-41-22 |
Safety Statements | 26-39 |
RIDADR | UN 3265 |
WGK Germany | 2 |
RTECS | SZ8562100 |
F | 10 |
TSCA | Yes |
HazardClass | 8 |
PackingGroup | II |
HS Code | 29319090 |
Hazardous Substances Data | 2809-21-4(Hazardous Substances Data) |
Toxicity | LD50 oral in mouse: 1800mg/kg |
