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Tetrasodium EDTA

Catalog Number

ACM64028-1

CAS

64-02-8

Structure

IUPAC Name

Tetrasodium;2-[2-[bis(carboxylatomethyl)amino]ethyl-(carboxylatomethyl)amino]acetate

Synonyms

Acetic acid, (ethylenedinitrilo)tetra-, tetrasodium salt;Tetrasodium ethylenediaminetetraacetate;Tetrasodium edetate

Molecular Weight

380.17

Molecular Formula

C10H12N2Na4O8

Canonical SMILES

C(CN(CC(=O)[O-])CC(=O)[O-])N(CC(=O)[O-])CC(=O)[O-].[Na+].[Na+].[Na+].[Na+]

InChI

UEUXEKPTXMALOB-UHFFFAOYSA-J

InChI Key

InChI=1S/C10H16N2O8.4Na/c13-7(14)3-11(4-8(15)16)1-2-12(5-9(17)18)6-10(19)20;;;;/h1-6H2,(H,13,14)(H,15,16)(H,17,18)(H,19,20);;;;/q;4*+1/p-4

Melting Point

>300 °C

Active Content

95%

Physical State

Solid

Typical Applications

Use as dispersing agent.

MSDS

Download MSDS

COA

Download COA

Spec Sheet

Download Spec Sheet

Case Study

EDTA-4Na Used for Enhancing Supercooling Stability and Thermal Storage in Erythritol-Based Phase Change Materials

EDTA-4Na Used for Enhancing Supercooling Stability and Thermal Storage in Erythritol-Based Phase Change Materials Pan, Mingming, et al. Chemical Engineering Journal 499 (2024): 156058.

Tetrasodium ethylenediaminetetraacetic acid (EDTA-4Na) has emerged as a multifunctional additive in the formulation of advanced phase change materials (PCMs) designed for long-term thermal energy storage. In a recent study, EDTA-4Na was employed to enhance the stability and thermal performance of erythritol (ERY), a sugar alcohol with high latent heat but poor supercooling behavior. The resulting composite-erythritol, EDTA-4Na, and superabsorbent polymer (SAP), collectively termed EES-PCMs-demonstrates a significant improvement in energy storage reliability and cycling performance.
In the synthesis process, EDTA-4Na was first dissolved with ERY in deionized water at 50 °C to create a homogenous solution. Subsequent integration of SAP helped immobilize the PCM within a stable matrix. After drying at 130 °C, the material exhibited enhanced phase change enthalpy, with the optimal formulation (EES-PCMs-2) reaching 286.62 J/g. Notably, the modified PCM showed stable properties after 100 thermal cycles and 120 days of storage, highlighting the role of EDTA-4Na in inhibiting spontaneous crystallization.
Furthermore, a novel air-triggered crystallization mechanism enabled rapid heat release, reaching 48.21 °C within 320 s at room temperature. This advancement presents EDTA-4Na as a critical functional component for developing high-performance, controllable PCMs in renewable energy systems, especially for seasonal solar thermal storage applications.

EDTA-4Na Used for the Preparation of PAN-Based Electrospun Fibers for Lead Ion Removal from Water

EDTA-4Na Used for the Preparation of PAN-Based Electrospun Fibers for Lead Ion Removal from Water Kun, Chu Cheng, Lin Po Yang, and Ming Chiao Chang. Results in Materials 16 (2022): 100344.

Ethylenediaminetetraacetic acid tetrasodium salt (EDTA-4Na) has been successfully employed as a chelating additive in the preparation of polyacrylonitrile (PAN)-based electrospun nanofibers for the efficient removal of lead ions (Pb²⁺) from aqueous environments. In this study, PAN fibers were dissolved in dimethylacetamide (DMAc) to prepare a 15 wt% spinning solution. EDTA-4Na was first dissolved in ultrapure water and uniformly mixed with DMAc, then incorporated into the PAN solution to yield a PAN/EDTA-4Na electrospinning blend with a viscosity of 1.53 × 10³ mPa·s-suitable for stable fiber formation.
Electrospun fibers containing EDTA-4Na exhibited an average diameter of 0.47 µm, slightly larger than the control PAN fibers (0.44 µm), indicating successful surface interaction and distribution of EDTA-4Na. Functional incorporation of EDTA-4Na significantly enhanced the lead adsorption capacity of the fiber mats. After 180 minutes of exposure to Pb²⁺-containing water, the PAN/EDTA-4Na fibers achieved a 34.47% adsorption rate, far surpassing the 9.77% removal rate observed for fibers without EDTA-4Na.
This improvement is attributed to the strong chelating ability of EDTA-4Na, which effectively complexes with heavy metal ions. The integration of EDTA-4Na into PAN electrospun membranes presents a cost-effective and scalable approach to designing functional filtration materials for water purification and environmental remediation.

Na4EDTA Used for the Activation of BOF Slag Hydration to Enhance Cementitious Performance

Na4EDTA Used for the Activation of BOF Slag Hydration to Enhance Cementitious Performance Jiang, Zhihan, et al. Cement and Concrete Research 198 (2025): 107983.

Ethylenediaminetetraacetic acid tetrasodium salt (Na4EDTA) has been demonstrated as an effective chemical activator for enhancing the hydration reactivity of basic oxygen furnace (BOF) slag-a byproduct traditionally limited by its low hydraulic activity. In this study, Na4EDTA was applied at varying dosages to activate BOF slag hydration, resulting in improved phase evolution, accelerated hydration kinetics, and superior mechanical and microstructural properties.
At an optimal dosage of 4.8 wt%, Na4EDTA enabled nearly complete hydration of brownmillerite within 24 hours and significantly boosted belite reactivity at early stages. The chelating action of EDTA⁴⁻ promotes rapid ion dissolution, thus facilitating the formation of hydrogarnet and calcium silicate hydrate (C-S-H) gel as the main hydration products. Furthermore, EDTA was partially incorporated into layered double hydroxides, contributing to heavy metal immobilization.
Mechanistically, Na4EDTA reduces porosity (from 33.1% to 14.9%) and enhances compressive strength (from 8.6 MPa to 38.8 MPa at 28 days), transforming BOF slag into a high-performance standalone binder. Leaching studies confirmed that, despite slight increases in Cr and V mobility, all samples remained compliant with environmental safety standards.
This work positions Na4EDTA as a promising activator for valorizing industrial byproducts into sustainable cementitious materials. Further research into dosage optimization and setting control strategies is essential for practical deployment in green construction technologies.

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