EDTA disodium salt (EDTA 2Na, CAS 139-33-3) is a high‑purity chelating agent with a minimum purity of 99 % and a molecular weight of 372.24 g·mol⁻¹. The white crystalline powder is highly soluble in water (≈100 g L⁻¹ at 20 °C) and exhibits three dissociation constants: pKa₁‑₂ = 2.0‑2.7, pKa₃‑₄ = 6.2‑6.7, pKa₅‑₆ = 10.3‑10.8. The molecule contains four carboxylate groups and two amine nitrogens, allowing it to form stable six‑coordinate complexes with a broad range of metal ions such as Fe³⁺, Cu²⁺, Zn²⁺ and Ni²⁺. This chelating ability makes EDTA 2Na indispensable in processes that require metal ion sequestration, for example in photographic developers, dye‑stabilisation systems, and polymerisation reactions where metal‑catalysed side reactions must be suppressed. In cosmetics, EDTA is frequently paired with antioxidants (vitamin E, ferulic acid) and emulsifiers, helping to preserve colourants, prevent rancidity of fatty acids, and extend shelf‑life of creams, shampoos and sunscreens. In the pharmaceutical field it is used in injectable solutions, oral dosage forms and topical gels to bind trace metals, thereby improving drug stability and bioavailability, and to control metal‑catalysed degradation pathways. In technical chemistry, EDTA 2Na is a core component of laundry detergents, water‑treatment chemicals, and industrial cleaners, where it sequesters calcium and magnesium, reduces scale formation, and enhances the performance of surfactants. It is also employed in reverse‑osmosis pretreatment, ion‑exchange resin regeneration, and boiler water treatment to prevent fouling and prolong equipment life. When handling the powder, protective gloves and safety glasses are recommended; dissolution should be carried out by adding the solid to water rather than to concentrated solutions to avoid localized overheating. Store the material in a dry, cool environment (5 °C‑30 °C) in a sealed container protected from direct sunlight. The product is supplied in 25 kg polypropylene bags with moisture barrier, ensuring protection against humidity and mechanical damage.
| Чистота | ≥99% |
| Форма | Белый кристаллический порошок |
| pH (1%) | 4.5–5.5 |
Bags 25 kg
Store EDTA disodium salt in a dry, well‑ventilated area protected from direct sunlight and moisture. Maintain ambient temperature roughly between +5 °C and +25 °C, avoiding rapid temperature swings. When packaging remains intact, the typical shelf life is about 24 months; any condensation or discoloration may compromise performance. Use protective gloves and safety goggles during handling and avoid inhaling dust. Ensure containers are tightly sealed and protect them from impact and humidity during transport.
