Ethylenediaminetetraacetic Acid Disodium Salt/EDTA-2Na
- CAS Number: 6381-92-6
- Chemical Formula: C10H14N2Na2O8
- MOQ: 1000KG
- Shelf Life: 2 years
- Synonyms: Disodium EDTA, EDTA disodium salt, Sodium EDTA, Edetate disodium salt dihydrate, EDTA disodium salt
Product Description
What Is EDTA-2Na?
EDTA-2Na (Ethylenediaminetetraacetic acid disodium salt) is a widely used chelating agent that forms stable complexes with metal ions, making it useful in fields such as analytical chemistry, medicine, agriculture, and industry. It is commonly employed for metal ion separation, analysis, and removal.
To create EDTA-2Na, ethylenediamine and chloroacetic acid combine to form EDTA, which is subsequently neutralized with sodium hydroxide to yield the disodium salt. The process involves first reacting ethylenediamine and chloroacetic acid in an alkaline medium, followed by adding sodium hydroxide to yield EDTA-2Na, which is then purified by crystallization.
Related Parameters:
| Item | Standard |
| Purity (by Titration) | ≥ 99% |
| pH (1% aqueous solution) | 4.0 – 6.0 |
| Water Content | ≤ 1.0% |
| Chloride (Cl) | ≤ 0.05% |
| Iron (Fe) | ≤ 0.001% |
| Heavy Metals (as Pb) | ≤ 0.001% |
| Arsenic (As) | ≤ 0.0002% |
| Sulfate (SO₄) | ≤ 0.05% |
| Melting Point | 250°C (decomposes) |
Recommended Dosage:
| Applications | Dosage |
| Shampoos & Conditioners | 0.05% – 0.5% |
| Facial & Body Cleansers | 0.1% – 0.3% |
| Toothpastes | 0.1% – 0.3% |
| Liquid Soaps | 0.1% – 0.5% |
| Cosmetic & Skin Care Products | 0.05% – 0.3% |
| Pharmaceutical Products | 0.01% – 0.1% |
| Food & Beverage (Stabilizer) | 0.01% – 0.1% |
| Cleaning Products (Industrial) | 0.1% – 1% |
| Metalworking Fluids | 0.1% – 0.5% |
| Water Treatment | 0.05% – 0.2% |
EDTA-2Na Has Wide Range of Uses:
- Personal Care: Used in shampoos, conditioners, and cleansers, it binds to metal ions in hard water, improving foaming and cleansing effectiveness.
- Cosmetics & Skin Care: Stabilizes products like moisturizers and sunscreens by preventing oxidation and discoloration due to metal impurities, enhancing shelf life and texture.
- Pharmaceuticals: In IV solutions and vaccines, it prevents metal ion contamination and stabilizes active ingredients. Detoxification treatments can employ it to rid the body of heavy metals.
- Food & Beverage: Acts as a preservative and stabilizer, preventing discoloration and degradation in processed foods and beverages.
- Industrial Cleaning: Added to detergents and cleaning agents to remove mineral deposits, limescale, and soap scum by chelating metal ions that reduce cleaning effectiveness.
- Water treatment is the process of eliminating metal impurities from water to stop scaling and enhance the quality of water in industrial systems.
- Metalworking: Prevents rust and metal deposits in coolants and lubricants, enhancing the performance of metalworking processes.
User Asked Question:
Q: Why is EDTA-2Na used in shampoos and conditioners?
A: EDTA-2Na is used in shampoos and conditioners to chelate metal ions (such as calcium and magnesium) that may be present in hard water. These metal ions can interfere with the performance of surfactants, reducing their effectiveness. By chelating these metals, EDTA-2Na helps to improve the foaming and cleansing properties of shampoos and conditioners.
