中文
English
Русский
Technical Specifications
Basic Information
| Item | Parameters |
|---|---|
| Product Name | Ethylenediaminetetraacetic Acid Disodium Salt / EDTA-2Na / Disodium EDTA |
| CAS Number | 6381-92-6 |
| Molecular Formula | C10H14N2Na2O8·2H2O |
| Molecular Weight | 372.24 |
| Appearance | White Crystalline Powder |
Industrial Grade Specifications
| Test Items | Standard |
|---|---|
| Content | 99.00% Min. |
| Chloride (Cl⁻) | 0.01% Max. |
| Sulfate (SO₄²⁻) | 0.05% Max. |
| Heavy metals (Pb) | 0.001% Max. |
| Iron (Fe) | 0.001% Max. |
| Chelating Value | 256 Min. (mgCaCO₃/g) |
| pH (50g/L, 25℃) | 4.0 — 5.0 |
| Appearance | White Crystalline Powder |
Household Grade Technical Specifications
| Test Items | Standard |
|---|---|
| Content | 99.50% Min. |
| Chlorine content (Cl⁻) | 0.01% Max. |
| Sulfate (SO₄²⁻) | 0.05% Max. |
| Heavy metals (Pb) | 0.001% Max. |
| Iron (Fe) | 0.001% Max. |
| Chelating Value | 267 Min. (mgCaCO₃/g) |
| pH (50g/L, 25℃) | 4.0 — 5.0 |
| NTA | 0.1% Max. |
| Appearance | White Crystalline Powder |
Product Description
Product Overview
Disodium EDTA (EDTA-2Na) is an important aminocarboxylic acid chelating agent with the chemical formula C₁₀H₁₄N₂Na₂O₈·2H₂O, molecular weight 372.24, and CAS number 6381-92-6. It appears as a white crystalline powder, easily soluble in water but poorly soluble in organic solvents. It offers excellent chelating properties, forming stable water-soluble complexes with various metal ions (such as calcium, magnesium, iron, copper, zinc), effectively preventing precipitation, discoloration, and oxidation caused by metal ions.
Product Properties
| Item | Description |
|---|---|
| Appearance | White Crystalline Powder |
| Molecular Formula | C₁₀H₁₄N₂Na₂O₈·2H₂O |
| Molecular Weight | 372.24 |
| Water-soluble | Easily soluble in water, dissolves quickly |
| pH value (50g/L, 25℃) | 4.0 — 5.0 |
| Stability | Chemically stable, not easily decomposed |
Key Benefits
- High PurityIndustrial grade content ≥ 99.00%, daily chemical grade content ≥ 99.50%
- Excellent Chelating AbilityHigh chelating value (256-267 mgCaCO₃/g), effectively chelates various metal ions
- Good StabilityChemically stable, maintains chelating ability over a wide pH range
- Wide ApplicationSuitable for multiple industries including cosmetics, petroleum, food, textiles, and detergents.
- Excellent Water SolubilityEasily soluble in water, dissolves quickly, convenient to use
- Stable Qualityrigorous quality control ensures batch consistency
Specification Grade Comparison
| Grade | Content | Chelating Value | Heavy Metal Limits | Application Areas |
|---|---|---|---|---|
| Industrial grade | ≥99.00% | 256 Min. | ≤0.001% | Industrial cleaning, petroleum, textiles |
| Cosmetic Grade | ≥99.50% | 267 Min. | ≤0.001% | Cosmetics, personal care, detergents |
Specification Grade
Application Areas
Cosmetics
Used as a chelating agent in cosmetics to prevent discoloration and deterioration caused by metal ions, improving product stability and shelf life.
Personal Care
Used in personal care products such as soaps and shampoos to enhance cleaning effectiveness and maintain formula stability.
Petroleum Industry
Used as an anti-caking agent to prevent metal ion precipitation in petroleum products, improving product quality and processing efficiency.
Food Additive
Used as a food additive to prevent oxidative spoilage caused by metal ions during food processing.
Textile Manufacturing
Used in textile dyeing and printing to chelate metal ions, improving dyeing quality and fabric performance.
Detergent
Added to detergents to enhance stain removal, soften water, and improve washing performance.
Industrial cleaning
Used in industrial cleaners to effectively remove oxides and dirt from metal surfaces.
- Store in a dry, ventilated warehouse, protect from direct sunlight
- Handle with care, prevent package damage
- Prevent moisture and rain during transport
Usage Reference
Usage and Dosage
| Application Areas | Recommended Dosage | Usage Instructions |
|---|---|---|
| Cosmetics / Personal Care | 0.05% — 0.1% | Add directly to aqueous phase, stir to dissolve |
| Detergent | 0.1% — 0.5% | Use in combination with surfactants |
| Textile Printing & Dyeing | 0.5 — 2 g/L | Used to soften water quality in dye baths |
| Industrial Cleaning | 1 — 5 g/L | Mixed with cleaner formulation |
| Petroleum Products | 0.01% — 0.1% | Added directly to oil |
Usage Notes
- It should be dissolved in an appropriate amount of warm water before being added to the final product formulation.
- Avoid mixing with strong oxidizing agents
- Store household-grade products in sealed containers to prevent moisture absorption
- Specific dosage should be adjusted based on product formulation and process requirements
- Conduct a small-scale test before use to determine optimal dosage
FAQ
Main differences between EDTA-2Na (disodium salt) and EDTA-4Na (tetrasodium salt):
- Chemical FormEDTA-2Na is the disodium salt of ethylenediaminetetraacetic acid (with two water molecules), EDTA-4Na is the tetrasodium salt (with four water molecules).
- pH ValueEDTA-2Na aqueous solution is weakly acidic (pH 4.0-5.0), EDTA-4Na aqueous solution is alkaline (pH 10.5-11.5)
- SolubilityEDTA-4Na has higher solubility in water (approximately 50%), while EDTA-2Na solubility is about 40%
- AppearanceBoth are white crystalline powders
- Application SelectionChoose the appropriate salt type based on the pH requirements of the formulation and specific application. Use EDTA-2Na for acidic cosmetic formulations and EDTA-4Na for alkaline industrial cleaning.
The main difference between industrial grade and daily chemical grade lies in purity requirements and applicable fields:
- Content RequirementsIndustrial grade ≥99.00%, Household grade ≥99.50%, Household grade has higher purity
- Chelating ValueIndustrial grade 256 Min., Household grade 267 Min., Household grade has stronger chelating ability
- NTA ContentFor household-grade, NTA ≤0.1%; industrial grade has no such requirement
- Application AreasCosmetic grade suitable for products in direct contact with the body such as cosmetics and personal care; industrial grade suitable for petroleum, textile, industrial cleaning and other industrial fields
Under original sealed, cool, dry, and well-ventilated storage conditions, the shelf life of this product is24 monthsStorage precautions:
- Store in a cool, dry, ventilated warehouse away from direct sunlight
- Protect from moisture; reseal or use promptly after opening
- Handle with care, prevent package damage
Yes, we offer free samples for customer testing. For specific sample quantities and shipping details, please contact our sales team. We provide both industrial and cosmetic grade samples for you to test and evaluate based on your application needs.
The standard minimum order quantity (MOQ) is 1 ton. For special specifications or custom packaging requirements, please confirm with our sales team. We support custom production based on samples and special specifications.
This product has been exported to Southeast Asia, the Middle East, Europe, South America and other regions. Export documents available include:
- Commercial Invoice
- Packing List
- Certificate of Origin (CO/Form E/Form A)
- SDS/MSDS (multi-language versions)
- Certificate of Analysis (COA)
- Sea/Air Waybill
- Other required certification documents
EDTA-2Na dissolution method:
- Warm Water DissolutionIt is recommended to dissolve in warm water at 40-50°C to speed up dissolution.
- Add GraduallyGradually add EDTA-2Na powder to water while stirring.
- Avoid Direct HeatingDo not place the product directly into boiling water to avoid clumping
- pH AdjustmentTo adjust pH, add a small amount of sodium hydroxide solution
The solubility of EDTA-2Na in water is about 40%; pay attention to temperature when preparing high concentration solutions.
Send Inquiry
Please fill in the information below, and our business team willWithin 2 Business DaysWe will reply to you.
Same Series Products
More EDTA Chelating Agent Product Options
