Chinese name: Disodium ethylenediamine tetraacetic acid
English name: Ethylenediaminetetraacetic acid disodium salt
CAS: 139-33-3
EINECS number: 205-358-3
Molecular formula: C10H14N2Na2O8
MDL number: MFCD00070672
Molecular weight: 336.21
Melting point: 248 °C (dec.)(lit.)
Boiling point: >100 °C
Density: 1.01g /mL at 25 °C
Vapor pressure: 0Pa at 25℃
Storage conditions: 2-8°C
Solubility: H2O: clear, colorless
Form: solution
Color: ≤5 (0.5M)(APHA)
Odor: at 100.00? %. odorless
Water solubility: miscible with water.
BRN: 3822669
Stability: hygroscopicity
LogP: -4.3 at 25℃
nature
1. EDTA has a wide range of coordination properties and can form stable chelates with almost all metal ions. Advantages: It provides the possibility of a wide range of determination of elements (better than acid-base and precipitation methods). It is easy to interfere between various components - selectivity 2, the coordination ratio between EDTA and the formed M-EDTA is mostly 1:1 3, and most of the chelates are charged, so they can dissolve in water and react quickly.
use
Ethylenediamine tetraacetic acid disodium is used as bleaching fixing solution for washing and processing color sensitive materials. It is also used as water purification agent, pH regulator, chelating agent, polyvalent chelating agent and coagulant inhibitor. It is also used in textile printing and dyeing, detergent, metal coating and metallurgical industry.
China
