Is Phosphonic acid, (1-hydroxyethylidene)bis- vegan?

Etidronic Acid is also known as Phosphonic acid, (1-hydroxyethylidene)bis-.

Etidronic acid, also known as etidronate, is a synthetic non-nitrogenous bisphosphonate compound used as a chelating agent in cosmetics and formerly as a medicinal drug for bone disorders.

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