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Portuguese Disodium EDTA (EDTA-2Na)
EDTA-2Na – Stable Chelating Agent
Disodium EDTA (EDTA-2Na) is a white crystalline powder, soluble in water but almost insoluble in alcohol. Its aqueous solution is weakly acidic. As a widely used chemical compound, EDTA-2Na possesses strong chelating ability, forming stable water-soluble complexes with various metal ions including calcium, magnesium, copper, iron, and lead. Its chemical structure contains multiple reactive carboxyl and amino groups, enabling it to effectively bind metal ions across a wide range of pH conditions. It is extensively used in daily chemical care, industrial water treatment, metal cleaning, and other fields.
- Efficiently chelates calcium, magnesium, and heavy metals
- Softens hard water, prevents soap scum and equipment scaling
- Performs excellently in neutral/weakly acidic systems
- Removes toxic heavy metals in wastewater treatment
| Paramètres | Spécifications |
|---|---|
| Contenu % | 99.50% Min. |
| Chloride (Cl⁻) % | 0.01% Max. |
| Sulfate (SO₄²⁻) % | 0.05% Max. |
| Heavy Metals (as Pb) % | 0.001% Max. |
| Iron (Fe) % | 0.001% Max. |
| Chelation Value (mgCaCO₃/g) | 267 Min. |
| pH (50g/L, 25℃) | 4.0 – 5.0 |
| NTA Content % | 0.1% Max. |
| Apparence | Poudre cristalline blanche |
Product Specifications (Daily Chemical Grade)
A 50g/L EDTA-2Na solution has a pH of 4.0–5.0 (weakly acidic), making it especially suitable for neutral to weakly acidic formulations such as cosmetics, personal care products, and certain industrial cleaners.
Recommended Dosage Guidelines
Remarque : Actual dosage should be optimized through laboratory testing based on water hardness, heavy metal concentration, and formulation pH.
| Application | Dosage recommandé | Fonction |
|---|---|---|
| Laundry Liquid / Dish Soap | 0.5% – 2.0% of total formulation | Hard water chelation, improved detergency |
| Body Wash / Shampoo | 0.1% – 0.5% | Chelates metal ions, stabilizes formulation |
| Cosmetics (Creams/Lotions) | 0.05% – 0.2% | Prevents oxidation and discoloration, extends shelf life |
| Boiler / Circulating Cooling Water | 5 – 50 ppm (continuous feed) | Scale inhibition, softening |
| Electroplating Wastewater | 1:1 – 3:1 molar ratio (based on heavy metal concentration) | Chelation of copper, nickel, lead, etc. |
| Metal Cleaning / Polishing | 1% – 5% solution | Removes rust and oxide scale |
Why Choose EDTA-2Na?
Performs Excellently in Neutral/Weakly Acidic Systems
High Chelation Value – Strong Metal Ion Binding Capacity
Stabilizes Formulations & Extends Shelf Life
Prevents Soap Scum & Equipment Scaling
EDTA-2Na vs. EDTA-4Na: Key Differences
| Comparison | EDTA-2Na (Disodium) | EDTA-4Na (Tetrasodium) |
|---|---|---|
| pH (solution 1%) | Weakly acidic / Near neutral (4.0–5.0) | Strongly alkaline (10.5–11.5) |
| Water Solubility | Bon | Extremely high, faster dissolution |
| Optimal Chelation Efficiency | Neutral / weakly acidic environments | Alkaline environments |
| Suitable Applications | Cosmetics, personal care, food, pharmaceuticals, neutral detergents | Alkaline detergents, industrial alkaline cleaners, high hardness water, heavy metal wastewater |
| Chelation Value (mgCaCO₃/g) | 267 Min. | 220 Min. |
| Chelation Characteristics | Mild and stable, suitable for standard neutral/weakly acidic systems | Strong, rapidly chelates Ca/Mg and multiple heavy metals |
If your main product system is cosmetics, personal care products, neutral detergents, food additives, or pharmaceutical excipients, EDTA-2Na is the better choice.
For strongly alkaline formulations (e.g., laundry liquids, dishwashing detergents, alkaline industrial cleaners), EDTA-4Na is recommended.
Main Application Areas
EDTA-2Na is widely used as a stable chelating agent and water softener across daily chemical care, industrial water treatment, and metal processing industries.
Daily Chemicals (Most Common)
Produits chimiques quotidiens
Body wash, laundry liquid, dish soap, and other liquid detergents
Softens hard water, improves detergency and foamability
Prevents soap scum formation, chelates metal ions, stabilizes formulations
Cosmetics & Personal Care
Creams, lotions, soaps, shampoos
Chelates metal ions to prevent oxidative degradation of ingredients
Extends product shelf life and maintains texture stability
Industrial Water Treatment
Boiler & Circulating Water Treatment
- Used as scale inhibitor and scale remover
- Prevents new scale formation, can dissolve some existing scale
- Inhibits equipment corrosion, extends system life
Wastewater Treatment
Electroplating wastewater, printing & dyeing wastewater
Chelates heavy metals such as copper, nickel, lead, and zinc
Reduces heavy metal toxicity for subsequent precipitation or recovery
Metal Cleaning & Polishing
Removes rust and oxide scale from metal surfaces
Improves metal surface finish
EDTA-2Na Packaging & Storage
We offer flexible packaging solutions to meet the diverse needs of our clients.
Sac de 25 kg
Standard powder packaging with moisture-proof function to ensure the stability of the product during transportation and storage.
Emballage personnalisé
Request Your Free EDTA-2Na Sample
Experience the stable chelation performance of high-purity EDTA-2Na in your neutral/weakly acidic system firsthand.
At Tenessy, experience our EDTA-2Na product firsthand with a FREE sample!
- Taille de l'échantillon : 25kg or 50kg.
- Expédition : Rapide via FedEx ou DHL.
- Service : Aide à l'ajustement de la formule par des experts.
