The charge of ethylenediamine is 0; it is neutral.

Na2EDTA is disodium ethylenediamine tetraacetate.

Leslie Reggel has written:

'Reduction of coal by lithium-ethylenediamine and reaction of model compounds with metal-amine systems' -- subject(s): Coal liquefaction, Ethylenediamine, Lithium

F. J. Welcher has written:

'The analytical uses of ethylenediamine tetraacetic acid'

EDTA stands for EthyleneDiamineTetraAcetic acid (the capitalization doesn't really belong there, it's just to show where the abbreviation comes from). It's generally made from ethylenediamine, formaldehyde, and sodium cyanide. though it can also be prepared from ethylenediamine and chloroacetic acid. If you regard any of those as "kitchen ingredients" remind me never to eat at your house.