Date published: 2025-11-29

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(1-Hydroxyethylidene)bis-phosphonic acid tetrasodium salt (CAS 3794-83-0)

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Alternate Names:
Tetrasodium 1-hydroxyethylidenediphosphonate
CAS Number:
3794-83-0
Molecular Weight:
293.96
Molecular Formula:
C2H4Na4O7P2
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
* Refer to Certificate of Analysis for lot specific data.

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(1-Hydroxyethylidene)bis-phosphonic acid tetrasodium salt, also known as Phosphonic acid, (1-hydroxyethylidene)bis-, tetrasodium salt, exhibits strong chelating properties and forms stable complexes with metal ions in aqueous solutions. These complexes are formed through the interaction of the oxygen and nitrogen atoms in the (1-Hydroxyethylidene)bis-phosphonic acid tetrasodium salt molecule with the metal ions, resulting in the formation of coordinated complexes. These complexes have the ability to bind metal ions to other molecules in the solution. As a result, (1-Hydroxyethylidene)bis-phosphonic acid tetrasodium salt is widely utilized as a chelating and sequestering agent in various applications, including detergents and water treatment.


(1-Hydroxyethylidene)bis-phosphonic acid tetrasodium salt (CAS 3794-83-0) References

  1. Development of USEtox characterisation factors for dishwasher detergents using data made available under REACH.  |  Igos, E., et al. 2014. Chemosphere. 100: 160-6. PMID: 24321331

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

(1-Hydroxyethylidene)bis-phosphonic acid tetrasodium salt, 25 g

sc-351955
25 g
$278.00

(1-Hydroxyethylidene)bis-phosphonic acid tetrasodium salt, 100 g

sc-351955A
100 g
$824.00