Ethylene Diamine Tetraacetic Acid (Edta)

Formula : C10H16N2O8
CAS : 60-00-4
Appearance: White powder
As it is so good at displacing molecules in coordination complexes, EDTA can be used to prevent undesired metals in trace amounts
from reacting and having detrimental effects on products.
In general, EDTA reduces the reactivity of metal, preventing any unwanted effects that may result from its presence.
EDTA is used in a salt form, most likely in disodium (EDTA-2Na)or calcium disodium EDTA (EDTA-CaNa2).

Specification
Analysis Contents
Analysis Standard
Appearance
White Crystalline Powder
Content : 99.00% min
Chloride : 0.050% max
Sulfate : 0.020% max
Heavy Metal (Pb) : 10ppm max
Ferrum (Fe) : 10ppm max
Chelating Value mg(CaCO3)/g : 339 min
PH Value (50g/L,25a ) : 2.8-3.0
Loss on drying : 0.20% max
Difference Between Disodium EDTA and Tetrasodium EDTA
The main difference between disodium EDTA and tetrasodium EDTA is that disodium EDTA has a pH lower than 7 whereas tetrasodium EDTA has a pH higher than 7.