# Totally Chlorine-Free (TCF) > Totally chlorine-free, or TCF, is a bleaching method that whitens cotton or pulp without any chlorine, usually with oxygen or hydrogen peroxide. Because chlorine bleaching can create dioxin, TCF is the cleanest whitening process and the one to look for on tampons and pads. **Type:** concepts **Categories:** tampons, baby-wipes, paper-towel **Risk Level:** low-concern **Evidence Strength:** strong **Status:** active **Source:** https://www.r3recs.com/learn/concepts/totally-chlorine-free ## Reality Check **Claim:** Totally chlorine-free tampons have zero dioxin. **Reality:** TCF creates no dioxin in processing, which is the avoidable source. But because past pollution left dioxin in soil, a tiny environmental trace can still appear in any natural fiber. TCF is the cleanest process, not a guarantee of an undetectable result. ## Overview Totally chlorine-free, abbreviated TCF, describes how a fiber like cotton or wood pulp is whitened: with no chlorine at any stage, typically using oxygen or hydrogen peroxide instead. It matters because of one chemistry problem. When chlorine is used to bleach pulp or cotton, it can create [dioxin](/learn/ingredients/dioxin), a group of byproducts that the World Health Organization's cancer agency classifies as known human carcinogens. TCF processing sidesteps that entirely. ## TCF vs ECF vs chlorine-bleached There are three levels you will see, from cleanest to least clean: - **Totally chlorine-free (TCF):** no chlorine at all. No dioxin is created in processing. This is the gold standard, common on organic-cotton [tampons](/category/tampons). - **[Elemental chlorine-free](/learn/concepts/elemental-chlorine-free) (ECF):** avoids chlorine gas but uses chlorine dioxide. Far better than old methods, with much lower dioxin potential, but not zero. - **Chlorine-bleached:** the old process historically tied to dioxin traces in tampons. The industry largely abandoned it in the late 1990s. ## Why R3 looks for it The FDA recommends that manufacturers disclose their bleaching process precisely because of the dioxin link. A brand that states 'totally chlorine-free' has closed off the avoidable manufacturing source of a known carcinogen. It is worth noting that a tiny environmental background trace of dioxin can remain in any natural fiber, because decades of pollution left dioxin in soil, so TCF addresses the process, not the unavoidable background. Still, on a label, TCF is the strongest bleaching claim you can find, which is why R3 scores it at the top of the bleaching signal for tampons. ## Also Known As - TCF - chlorine-free bleaching - oxygen bleached ## Where Found - Organic-cotton tampons and pads - Chlorine-free wipes and paper products ## Label Guide **Look for:** - 'Totally chlorine-free' or 'TCF' on tampons, pads, wipes - Often paired with organic cotton on the cleanest products **Avoid / misleading:** - 'Whitened' or 'purified' with no process named - Assuming TCF means zero dioxin (a trace environmental background can remain) ## What Helps Choose tampons, pads, and wipes labeled totally chlorine-free to avoid the bleaching step historically tied to dioxin. ECF is an acceptable step below; a product that names no process is the one to question. ## How To Verify Look for 'totally chlorine-free' or 'TCF' printed on the package. The FDA recommends brands disclose the bleaching process, so a brand that states it is more trustworthy than one that stays silent. ## Why TCF tops the bleaching score R3 scores totally chlorine-free at the top of the tampon bleaching signal, above elemental chlorine-free, because it closes off the manufacturing source of dioxin entirely. ## What This Does Not Cover TCF describes the bleaching process. It does not address heavy metals or PFAS, which come from other sources, so read it alongside a brand's testing claims. ## R3 Bottom Line - TCF means whitened with no chlorine, so no dioxin is created in processing. - It is the cleanest of the three levels: TCF, then ECF, then chlorine-bleached. - Look for 'totally chlorine-free' on tampons, pads, and wipes; it is the strongest bleaching claim. - TCF removes the manufacturing source of dioxin, not the unavoidable trace environmental background. ## FAQ ### What does totally chlorine-free (TCF) mean? TCF means a fiber like cotton or pulp was whitened with no chlorine at any stage, usually using oxygen or hydrogen peroxide. It matters because chlorine bleaching can create dioxin, a known carcinogen, and TCF avoids that process entirely. It is the cleanest bleaching method and the strongest claim to look for on tampons. ### Is TCF better than ECF? Yes. Totally chlorine-free (TCF) uses no chlorine at all, so it creates no dioxin in processing. Elemental chlorine-free (ECF) avoids chlorine gas but uses chlorine dioxide, which is far better than old methods but not zero. TCF is the gold standard; ECF is an acceptable step below it. ### Do TCF tampons have any dioxin? TCF tampons have no dioxin created during bleaching, which is the avoidable source. However, because decades of pollution left dioxin in soil, air, and water, a tiny environmental background trace can appear in any natural fiber. TCF addresses the manufacturing process, not the unavoidable environmental background. ### How do I know if a tampon is totally chlorine-free? Look for 'totally chlorine-free' or 'TCF' printed on the package. The FDA recommends manufacturers disclose their bleaching process, so a brand that clearly states TCF is giving you the cleanest signal. A product that names no process at all is the one to question. ### Why does chlorine bleaching matter for tampons? Chlorine bleaching of cotton or pulp can create dioxin, which the WHO's cancer agency classifies as a known human carcinogen. Tampons are worn against absorbent tissue, so avoiding an added carcinogen source matters. The industry largely moved to chlorine-free processing in the late 1990s, and TCF is the cleanest version. ## Sources - [FDA Regulation of Tampons](https://www.congress.gov/crs-product/IN12441) — *Congressional Research Service / FDA* (2024) - [Tampon Safety](https://www.center4research.org/tampon-safety/) — *National Center for Health Research* (2024) - [Dioxins and their effects on human health](https://www.who.int/news-room/fact-sheets/detail/dioxins-and-their-effects-on-human-health) — *World Health Organization* (2023) - [2,3,7,8-TCDD Hazard Summary](https://www.epa.gov/sites/default/files/2016-09/documents/2-3-7-8-tetrachlorodibenzo-p-dioxin.pdf) — *U.S. EPA* (2016) - [Menstrual Tampons and Pads: 510(k) Guidance](https://www.fda.gov/medical-devices) — *U.S. FDA* (2024) - [Dioxin](https://www.ewg.org/research/dioxin) — *Environmental Working Group* (2024) - [Toxicological Profile for Chlorinated Dibenzo-p-Dioxins](https://www.ncbi.nlm.nih.gov/books/NBK602056/) — *ATSDR / NCBI* (2024) --- Source: https://www.r3recs.com/learn/concepts/totally-chlorine-free Methodology: https://www.r3recs.com/methodology/how-we-score-products