Glyphosate originally cleaned metals like Magnesium and Zinc before it became a herbicide

Glyphosate was originally patented and used as an industrial chelating agent — essentially a descaling chemical for cleaning out pipes, boilers, and other industrial equipment.

The story has two threads:

1. It was first synthesized in 1950 by Swiss chemist Henri Martin at the pharmaceutical company Cilag, but no pharmaceutical use was ever found, and the compound sat unused.

2. It was independently re-synthesized in 1964 by Stauffer Chemical, which patented it as a chelator. Glyphosate binds tightly to divalent and trivalent metal cations (calcium, magnesium, manganese, copper, zinc, iron), so it was used to strip mineral scale and metal deposits from industrial water systems.

The herbicidal property wasn't discovered until 1970, when John Franz at Monsanto screened it as part of a program looking for new herbicides. Roundup hit the market in 1974.

Interestingly, that chelating activity is the same property that drives much of the ongoing controversy about glyphosate's biological effects — the argument being that residual glyphosate may bind essential mineral cofactors in soil, plants, gut microbes, and humans, which is relevant to nutrient availability and potentially to vitamin D–related metabolic pathways given how mineral-dependent that system is.

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