Conventional pads can contain phthalates, dioxins and fragrance. See what is inside a sanitary pad and how a non-toxic swap is built.
A conventional sanitary pad is mostly plastic, wood-pulp fluff and superabsorbent polymer, often with fragrance and traces of phthalates or dioxins. A non-toxic sanitary pads swap drops those and uses organic cotton with chlorine-free (TCF) processing.
Search non-toxic sanitary pads and you get two camps: brands that removed the perfume, and brands that rebuilt the pad from the fibre up. To tell them apart you have to know what is actually inside a conventional pad. So let's open one. Not literally — but layer by layer, the way a lab would.
What a standard pad is made of
Most pads on a supermarket shelf share the same skeleton. A polypropylene topsheet touches the skin. Under it sits an absorbent core of wood-pulp fluff plus superabsorbent polymer (SAP) — the same sodium polyacrylate crystals used in disposable diapers. A polyethylene or PVC backsheet stops leaks, and synthetic fragrance masks the plastic smell. None of that is a toxin by itself. The worry is the residue and the additives.
The chemicals people ask about
A 2023 systematic review in the British Journal of Obstetrics and Gynaecology (BJOG) found conventional menstrual products can contain phthalates, volatile organic compounds (VOCs), parabens, environmental phenols, fragrance chemicals, and dioxin-like compounds — many classified as endocrine-disrupting chemicals (EDCs) PubMed. A 2019 study in Environmental Research found pads and diapers carried higher phthalate levels than most common plastic products, likely from the flexible PVC backsheet EPA dioxin facts.
Here is the part that matters anatomically: the vulvar and vaginal mucosa is thin, highly vascularised, and lacks the protective stratum corneum most skin has. Chemicals that touch it bypass first-pass liver metabolism and enter circulation directly. That is why "non-toxic" is a real design goal, not a marketing mood.
| Layer | Conventional | Non-toxic swap |
|---|---|---|
| Topsheet | Polypropylene, may hold titanium-dioxide whiteners | GOTS-certified organic cotton, unbleached or TCF-bleached |
| Core | ECF-bleached pulp + SAP | Organic cotton, sometimes plant-based bio-SAP |
| Backsheet | PE or PVC with phthalate plasticisers | Plant-based PLA film or phthalate-free polyethylene |
| Extras | Synthetic fragrance, solvent inks | None; water-based inks or no print |
Chlorine: ECF is not TCF
Bleaching is where dioxins come from. ECF (Elemental Chlorine-Free) uses chlorine dioxide and cuts dioxin by 90–95%. TCF (Totally Chlorine-Free) uses oxygen-based agents and removes chlorine entirely. A pad labelled "chlorine-free" without saying TCF is almost certainly ECF. The cleanest non-toxic sanitary pads are TCF-bleached.
What the swap actually changes
A genuine toxin-free pad removes three things first: the fragrance, the phthalate-plasticised backsheet, and the ECB-bleached pulp. It replaces the topsheet with organic cotton and proves it with a certificate, not a slogan. Our certifications guide shows which marks carry weight, and the organic vs regular comparison covers the comfort trade-off.
Frequently asked questions
Are all pads full of toxins?
No. Many mainstream brands are ECF-bleached and fragrance-light. The difference is proof: non-toxic lines document TCF bleaching, phthalate-free backsheets and independent testing.
Is SAP dangerous?
SAP (sodium polyacrylate) is generally considered inert. The debate is purity and "100% plant-based" claims — bio-SAP exists but costs more and absorbs a little less.
Do non-toxic pads cost more?
Yes, typically 2–3x, driven by organic cotton yield and certification audits. For sensitive users the trade is often worth it.
How do I spot greenwashing?
"Natural" with no logo means nothing. Look for GOTS or OEKO-TEX on the pack and ask for a batch-level certificate.
Related reading: certifications guide, organic vs regular, sensitive skin guide, and our feminine care OEM.
