Skip to Content
Merck
All Photos(1)

Documents

54342

Sigma-Aldrich

Etidronic acid monohydrate

≥95.0% (T)

Synonym(s):

(1-Hydroxyethylidene)bisphosphonic acid monohydrate, 1-Hydroxyethylidenediphosphonic acid

Sign Into View Organizational & Contract Pricing
All Photos(1)

About This Item

Empirical Formula (Hill Notation):
C2H8O7P2 · H2O
CAS Number:
25211-86-3
Molecular Weight:
224.04
EC Number:
220-552-8
MDL number:
MFCD10567440
UNSPSC Code:
12352100
PubChem Substance ID:
57651468
NACRES:
NA.22

Assay

≥95.0% (T)

SMILES string

O.CC(O)(P(O)(O)=O)P(O)(O)=O

InChI

1S/C2H8O7P2.H2O/c1-2(3,10(4,5)6)11(7,8)9;/h3H,1H3,(H2,4,5,6)(H2,7,8,9);1H2

InChI key

KKNZXUHBWLPUFN-UHFFFAOYSA-N

Looking for similar products? Visit Product Comparison Guide

Application

Etidronic acid monohydrate also known as 1-hydroxyethylidenediphosphonic acid (HEDP) is an organophosphonic acid that can be used to surface functionalize NaY molecular sieves. HEDP/NaY can be used as a catalyst for n-butyl acetate production via esterification.
It can be also employed as a chelating agent in the synthesis of metal-ligand complexes.

Other Notes

Powerful complexing agent

Pictograms

CorrosionEnvironment
GHS05,GHS09

Signal Word

Danger

Hazard Statements

H318,H411

Precautionary Statements

P280 - P305 + P351 + P338 + P310

Hazard Classifications

Aquatic Chronic 2 - Eye Dam. 1

Storage Class Code

11 - Combustible Solids

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Four novel oxomolybdenum-organodiphosphonate hybrids in the presence of Cu (II)-organonitrogen building blocks: synthesis, crystal structures, and surface photovoltage properties
Sun S-H, et al.
Crystal Growth & Design, 13(1), 226-238 (2012)
Optimization of production conditions of n-butyl acetate over NaY supported organophosphonic acid catalyst using response surface methodology
Chen L, et al.
Journal of the Taiwan Institute of Chemical Engineers, 42(5), 768-774 (2011)
L. Maier
Chimia, 23, 323-323 (1969)
Hydrothermal synthesis, structures, and luminescent properties of four new zinc (II) diphosphonate hybrids with mixed ligands
Wang W-N, et al.
CrystEngComm, 13(20), 6099-6106 (2011)

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service