Disodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(HEDP•Na2)
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid Disodium Salt (HEDP·Na₂) is an important organic phosphonate compound with the molecular formula C₂H₆O₇P₂Na₂ and a molecular weight of approximately 250 g/mol. The following provides a detailed introduction from aspects such as chemical properties, application fields, safety, and specification parameters:
Chemical Properties
1. Appearance and Form
HEDP·Na₂ is typically a white powder or colorless to pale yellow transparent liquid, with its specific form depending on the production process and purity.
2. Solubility
It is highly soluble in water, forming a weakly acidic solution (pH value of 4.0–6.0 for a 1% aqueous solution).
3. Stability
It remains stable under high-temperature (even up to 250°C) and high-pH conditions, and is resistant to hydrolysis or decomposition.
It exhibits good resistance to light and heat, making it suitable for long-term storage and use.
4. Chelating Ability
It forms stable hexagonal ring chelates with metal ions such as Fe²⁺, Cu²⁺, and Zn²⁺, effectively preventing metal ion precipitation or scaling.
HEDP•Na2
TDS
HEDP.Na2 Application
1. Water Treatment
* Scale Inhibition and Corrosion Inhibition: Widely used in circulating cooling water systems, medium- and low-pressure boilers, and oilfield water pipelines to prevent the deposition of calcium, magnesium, and other salts (such as calcium carbonate scale) and metal corrosion.
* Synergistic Effect: When used in combination with other water treatment agents (such as polycarboxylic acids), it significantly enhances scale inhibition and corrosion inhibition effects.
2. Industrial Applications
* Textile Industry: Used as a cleaner for metal and non-metal surfaces to remove oxide layers and impurities.
* Dye Industry: Used as a peroxide stabilizer and dye fixative to improve dyeing fastness and uniformity.
*Cyanide-free electroplating: Used as a chelating agent to replace cyanides in environmentally friendly electroplating processes.
3. Other Applications
*Electronic cleaning: High-purity HEDP·Na₂ can be used for precision cleaning of electronic components.
*Cosmetic additives: Used as a chelating agent or stabilizer to improve the performance of detergents or cosmetics.
Package and Storage
Package and Storage
25kg kraft bag or 250kg plastic drum, or confirmed by clients Storage for ten months in shady room and dry place.
Safety Protection
Weak acidity, Avoid contact with eye and skin, once contacted, flush with water.
