Here's why:

* Organic compounds are defined as compounds that contain carbon atoms bonded to hydrogen atoms.

* Inorganic compounds are compounds that lack carbon-hydrogen bonds.

While EDTA (ethylenediaminetetraacetic acid) itself has a carbon backbone, the disodium salt of EDTA has lost the hydrogen atoms from the carboxyl groups, replaced by sodium ions. Therefore, it does not meet the criteria for an organic compound.