The tariff classification of Ethylenediaminetetraacetic Acid (CAS #60-00-4). Ethylenediamintetraacetic Acid (EDTA) is a polyamino carboxylic acid widely used in chelation therapy in the medical community to treat acute and chronic lead poisoning by pulling toxins including heavy metals such as lead, cadmium, and mercury from the bloodstream. It is also widely used to dissolve lime scale.
[1] Please importantly note that only the relevant portion of the related is displayed above. You may refer to the said customs ruling for the entire ruling explanation.
[1]. https://rulings.cbp.gov/ruling/N239750