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54342

Sigma-Aldrich

Etidronic acid monohydrate

≥95.0% (T)

Synonym(s):

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

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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

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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

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

JAN Code

54342-BULK:
54342-VAR:
54342-10G:
54342-50G:

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’.

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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)
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)

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