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RXSOL Tetrasodium EDTA 40% Liquid is a concentrated aqueous solution of tetrasodium ethylenediaminetetraacetate (Na₄EDTA), a powerful chelating and sequestrating agent.
It binds polyvalent metal ions such as calcium, magnesium, iron, copper and other metal ions, converting them into stable water-soluble complexes. This helps prevent precipitation and assists in removing mineral and metallic deposits during industrial cleaning.
The product is particularly useful in reverse osmosis (RO) membrane cleaning/CIP, where EDTA can assist in removing metal-containing deposits and certain inorganic/organic foulants. DuPont's FilmTec RO/NF technical manual specifically lists 1.0 wt% Na₄EDTA with 0.1 wt% NaOH as an alternative cleaning solution for biofouling, subject to membrane compatibility and the manufacturer's cleaning limits.
Manufacturing, EDTA is used to improve stability of some pharmaceutical products, detergents, liquid soaps, shampoos, agricultural chemical sprays, contact lens cleaners and cosmetics. It is also used in certain blood collection tubes used by medical laboratories.
Wide areas of application for EDTA 4 Na liquid
RXSOL Tetrasodium EDTA 40% should not be considered a universal RO membrane cleaner by itself.
The correct cleaning chemistry depends on the foulant. Acid cleaning is generally used for carbonate/mineral scale, while alkaline cleaning is commonly used for organic and biological fouling. EDTA is particularly useful where metal-ion fouling or metal-associated deposits are involved.
DuPont's FilmTec manual gives 1.0 wt% Na₄EDTA + 0.1 wt% NaOH as an alternative cleaning formulation under specified membrane cleaning conditions.
For compatible RO membranes:
| Component | Concentration |
|---|---|
| RXSOL Tetrasodium EDTA 40% | 2.5% |
| Sodium Hydroxide | 0.10% |
| RO Permeate / DI Water | Balance |
This provides approximately:
1.0% active Na₄EDTA
Tetrasodium EDTA Solution 40%
EDTA-4Na 40% Aqueous Solution is a concentrated liquid solution of Tetrasodium Ethylenediaminetetraacetate (Tetrasodium EDTA), a powerful water-soluble chelating and sequestering agent.
The product forms stable, water-soluble complexes with polyvalent metal ions such as calcium, magnesium, iron, copper, manganese and zinc. By binding these metal ions, EDTA-4Na helps prevent unwanted precipitation, scale formation, metal-catalyzed reactions and interference with industrial processes.
The 40% liquid form provides convenient handling, rapid dispersion and accurate dosing compared with solid EDTA salts and is suitable for use in water treatment, industrial cleaning, detergents, textile processing, chemical formulations and other industrial applications.
| Property | Typical Specification |
|---|---|
| Product Name | EDTA-4Na 40% Aqueous Solution |
| Chemical Name | Tetrasodium Ethylenediaminetetraacetate |
| Active Content | 40 ± 1% w/w |
| Appearance | Clear, colourless to pale yellow liquid |
| pH | 10.5–12.0 |
| Specific Gravity @ 20–25°C | Approx. 1.28–1.32 |
| Solubility | Completely miscible with water |
| Ionic Character | Anionic |
| Function | Chelating / sequestering agent |
| Odour | Mild / characteristic |
| Calcium & Magnesium Chelation | Excellent |
| Iron Chelation | Excellent |
Final specification limits should be confirmed from actual production batches.
EDTA-4Na 40% Solution is widely used in:
In water-treatment formulations, EDTA-4Na binds calcium, magnesium, iron and other dissolved metal ions, helping keep them in soluble complexes and reducing their ability to interfere with treatment processes or contribute to undesirable deposits.
It is particularly useful where hardness sequestration and trace-metal control are required.
EDTA-4Na can improve detergent and cleaner performance by binding hardness ions that would otherwise interfere with surfactants and alkaline cleaning agents.
It is useful in formulations for:
Heavy-duty cleaners, degreasers, equipment cleaners, alkaline cleaning formulations and scale-removal/support formulations.
EDTA-4Na 40% Solution provides high chelating efficiency, excellent water solubility, convenient liquid handling and compatibility with many alkaline formulations. Its liquid form eliminates the dissolution step associated with powdered EDTA and makes it particularly suitable for automated dosing and large-scale industrial formulation.
Store in the original tightly closed container in a cool, dry and well-ventilated location. Protect against extreme temperatures and contamination.
Because EDTA-4Na 40% solution is alkaline, appropriate gloves and eye protection should be used during handling. Refer to the product SDS for complete safety and handling requirements.
EDTA SOLUTION 40%, Tetrasodium EDTA 40 percent solution for RO Systems
Benefits of using EDTA Tetrasodium liquid in Reverse Osmosis Membrane Cleaning
RXSOL Tetrasodium EDTA 40% can provide:
Metal Ion Sequestration
Captures calcium, magnesium, iron and other polyvalent ions.
Deposit Loosening
Helps destabilize metal-containing deposits and make them more soluble/dispersible.
Reduced Re-precipitation
Keeps captured metal ions in soluble complexed form during cleaning.
Improved Cleaning Chemistry
Can be combined with alkaline cleaning systems where appropriate.
Concentrated Liquid Format
Easy metering compared with handling solid EDTA powder.
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