Description

Tetrasodium Alpha,.Alpha'.-(Ethylenediimino)Bis[(2-Hydroxy-5-Sulphonatophenyl)Acetate] is a high-purity, water-soluble chelating agent and complexing compound. It matters for its exceptional ability to sequester and deactivate di- and trivalent metal ions, particularly iron and copper, which can cause unwanted oxidation and catalytic degradation in sensitive formulations. This product is essential for manufacturers in the personal care, detergent, photographic, and industrial cleaning sectors who require reliable stabilization and protection of their products.

Application

• Detergent & Cleaning Formulations: Acts as a superior builder and chelant to inactivate water hardness ions (Ca²⁺, Mg²⁺) and heavy metals, enhancing surfactant performance and preventing fabric discoloration.
• Personal Care Products: Used in shampoos, liquid soaps, and creams as a stabilizer to chelate pro-oxidant metal ions, thereby extending shelf-life and maintaining product clarity and color.
• Photographic Industry: Serves as a key component in developer and bleach-fix solutions to complex iron ions, ensuring consistent image processing and preventing sludge formation.
• Industrial Water Treatment: Employed in boiler and cooling water systems to control scale formation and inhibit corrosion by sequestering metal ions.
• Textile Processing: Used in bleaching and dyeing baths to prevent catalytic damage from metal impurities on fabrics, improving color yield and fiber strength.
• Pulp & Paper Manufacturing: Helps in peroxide bleaching stages by stabilizing hydrogen peroxide against decomposition catalyzed by transition metals like manganese and iron.

Basic Information

Product Name	Tetrasodium Alpha,.Alpha'.-(Ethylenediimino)Bis[(2-Hydroxy-5-Sulphonatophenyl)Acetate]
CAS No.	90247-45-3
Molecular Formula	C₂₀H₁₆N₂Na₄O₁₄S₂
Molecular Weight	670.42 g/mol
Synonyms	Ethylenediamine-N,N'-disuccinic acid, tetrasodium salt (EDDS, Na₄); Tetrasodium ethylenediaminedisuccinate; [S,S]-EDDS; Octaquest; EDDS-Na₄; 3,3'-[1,2- Ethanediyldiimino]bis[2-hydroxy-5-sulfobenzoic acid] tetrasodium salt; Tetrasodium 3,3'-(Ethylenediimino)di(2-hydroxy-5-sulphonatobenzoate)
EINECS	Contact for details

Quality Control

Our Tetrasodium EDDS is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for chelation value, purity, and metal content. A comprehensive Certificate of Analysis (COA) documenting identity, assay, pH, and specific impurity limits is available for each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); the original container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can lead to caking or reduced efficacy.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
pH (1% Solution)	10.0 - 11.5
Water Content	≤ 5.0%
Iron (Fe)	≤ 10 ppm
Heavy Metals (as Pb)	≤ 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.