Description
Chemical Name:Ethylenediaminetetraacetic acid disodium salt
Cas No:139-33-3
Synonyms:EDTA-2Na standard solution;EDTA, DISODIUM DIHYDROGEN;EDTA STANDARD;Ethylenedinitrilotetraacetic acid disodiuM salt, 0.05 M solution in H2O
Molecular Weight:336.21
Molecular Formula:C10H14N2Na2O8
Molecular Structure:
Specification:
Items | Specifications |
Melting point | 248 °C |
Boiling point | >100 °C |
Density | 1.01 g/mL at 25 °C |
Chloride(Cl)% | 0.02% |
Purity | 99% |
Water solubility | Miscible with water. |
LogP | -4.3 at 25℃ |
PH | 4.0~5.0 |
Sulfate | ≤0.02% |
NTA | 1.0% |
Function:
Complexing function: It can form stable water-soluble complexes with a variety of metal ions (such as calcium, magnesium, iron, copper, etc.), coordinate with metal ions through the carboxyl and amino groups in its molecules, wrap the metal ions in the complex structure, and thus reduce the activity of metal ions.
Antioxidant function: Since it can complex metal ions with catalytic oxidation, it can prevent metal ions from catalyzing oxidation reactions, thereby playing an antioxidant role and reducing the damage of oxidation reactions to substances.
pH adjustment function: It can adjust and stabilize the pH value of the solution to a certain extent, and play a certain buffering role on acid-base changes by interacting with hydrogen ions or hydroxide ions in the solution, and maintain the acid-base balance of the system.
Application:
Cosmetics industry
Stabilizer: can complex metal ions in cosmetics to prevent metal ions from catalyzing reactions such as oil oxidation and fragrance deterioration, improve the stability and shelf life of cosmetics, and prevent cosmetics from discoloration, taste change, stratification, etc.
Synergizer: synergizes with other ingredients in cosmetics to enhance the efficacy of cosmetics. For example, combined with sunscreen, it can improve the absorption effect of sunscreen on ultraviolet rays.
Water treatment field
Softening hard water: can complex with calcium and magnesium ions in water, remove these ions that cause water hardness to increase or reduce their concentration, soften hard water, reduce scale deposition in pipes and equipment, improve water quality, and extend equipment life.
