Probably, but the process doesn't work that way. The default is that you can't sell medication to people, period. Some pharmaceutical company applied to have a specific form of EDTA approved as a prescription drug, and that was that.

Separately from this, substances that meet the criteria of being "natural" can be sold as supplements as long as you don't claim they cure anything. EDTA is naturally-occurring and you can buy it as a supplement in the US, although the FDA has some beef with this, which I think is what the original remark might be alluding to.

EDTA is also a common food additive and a laboratory reagent, so people who want to use it can buy it easily, which makes the whole debate basically performance art.