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Agent Orange has been listed as one of the Natural sciences good articles under the good article criteria. If you can improve it further, please do so. If it no longer meets these criteria, you can reassess it. Review: March 30, 2017. (Reviewed version).

This article was reviewed by Nature (journal) on December 14, 2005. Comments: It was found to have 2 errors. For more information about external reviews of Wikipedia articles and about this review in particular, see this page.

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Participate in the deletion discussion at the nomination page. —Community Tech bot (talk) 06:54, 27 May 2025 (UTC)[reply]

Hello editors, I would like to propose a clarification to two passages in the article to improve precision around the attribution of dioxin contamination in Agent Orange.

Proposed edits (suggested new text in bold) 1. Primarily a mixture of equal parts of two herbicides, 2,4,5-T and 2,4-D, the 2,4,5-T contained trace amounts of 2,3,7,8-TCDD, a dioxin compound established as a carcinogen and persistent organic pollutant.

2. The active ingredient of Agent Orange was an equal mixture of two phenoxy herbicides – 2,4-dichlorophenoxyacetic acid (2,4-D) and 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) – in iso-octyl ester form. The 2,4-5-T contained traces of the dioxin 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD).

Rationale In these two places, the current wording could be read as implying that the mixture as a whole—or both herbicide components—contained dioxin contamination, without clearly distinguishing between the two active ingredients: The current phrasing may unintentionally obscure an important technical distinction: that TCDD contamination was associated with the manufacture of 2,4,5-T and not 2,4-D. This differentiation is supported by the United States Environmental Protection Agency, which distinguish between the two components of Agent Orange and attributes dioxin contamination to the production of 2,4,5-T (source: https://www.epa.gov/ingredients-used-pesticide-products/24-d)

In addition, this distinction is already reflected elsewhere on Wikipedia. For example, the Auxin page states: “The compound 2,4-D is still in use and is thought to be safe, but 2,4,5-T was more or less banned by the U.S. Environmental Protection Agency in 1979. The dioxin TCDD is an unavoidable contaminant produced in the manufacture of 2,4,5-T. As a result of the integral dioxin contamination, the use of 2,4,5-T products has been implicated in…” (source: (https://en.wikipedia.org/wiki/Auxin)

This phrasing more clearly attributes the source of TCDD without implying that both herbicides contributed equally to that contamination. Aligning the Agent Orange page with this existing internal treatment would improve consistency and technical clarity across articles.

Notes These edits are intended to improve clarity rather than change substance. They align with existing sourcing and with how related articles (e.g., Auxin) present the same distinction. They remain consistent with WP:NPOV and WP:V by improving precision and attribution.

Happy to assist with sourcing or further refinement if helpful. Lindsay Thompson 2,4-D Research Task Force (talk) 16:42, 21 May 2026 (UTC)[reply]

Note --

I just saw that the French Wikipedia page for Agent Orange also has a more accurate description

"Plus précisément, la dioxine était présente parmi les impuretés dérivant de la fabrication du seul 2,4,5-T, qui entre dans la composition de l'agent orange (le 2,4-D quant à lui, ne contenant pas de dioxine, reste un des herbicides les plus utilisés dans le monde)."

Translation: "More specifically, dioxin was found among the impurities resulting from the manufacture of 2,4,5-T alone, which is a component of Agent Orange (2,4-D, which does not contain dioxin, remains one of the most widely used herbicides in the world)."

Incorporating this distinction onto the English page would help with clarity and understanding Lindsay Thompson 2,4-D Research Task Force (talk) 16:55, 21 May 2026 (UTC)[reply]

Unless I was reading a different page and assumed it was this one, I thought we already laid out that it was contamination in the 2,4,5-T that lead to issues (and that 2,4-D wasn't the issue). It must have been something other than the auxin page though I was thinking of.

Even sources discussing the US government wartime-compelling pesticide companies (under protest) to produce it in a manner that would lead to dioxin contamination have been good at spelling this out. Could just be worth having a section early on titled Dioxin contamination or something like that to help center things for readers. I know it's not uncommon to hear people claim, "It's agent orange." when talking about 2,4-D alone, so it's probably worthwhile to avoid confusion for readers too. KoA (talk) 21:31, 21 May 2026 (UTC)[reply]