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Chapter 11: The supporting cast · Part 1: Polymers

Polyvinylpyrrolidone (PVP)

  • Made from a hazardous chemical
  • Contaminant risk
Also called
povidone, PVP, E1201
Found in
laundry liquid and powder ("colour care")

The worst fact: it barely breaks down. In standard tests, PVP was "non-biodegradable" (under 10%) and showed no further breakdown after 42 days, which the authors said "indicates their environmental persistence".

Why brands use it: it's a dye transfer inhibitor: it grabs loose dye in the wash so it can't stain other clothes.

Take care if: you've had a reaction to povidone-iodine antiseptic. Povidone allergy is rare, but doctors have reported anaphylaxis in children.

Comes from: N-vinylpyrrolidone, made from 2-pyrrolidone and acetylene. Australia classes N-vinylpyrrolidone as "Suspected of causing cancer". That doesn't mean it's in the product, but it's not a great starting point for something you clean with.

Myth check: "All water-soluble polymers break down": no. In the same study, PVA and PEG were "readily biodegradable"; PVP wasn't.

Contaminants: leftover N-vinylpyrrolidone and hydrazine (Australia: "May cause cancer"). EU food grade allows up to 10 mg/kg N-vinylpyrrolidone and 1 mg/kg hydrazine. They're unlikely in a well-made product, but it's a factor you can't see on the label.

Fair to say: PVP and its copolymers are "in general considered to have low toxicity", and JECFA allows up to 50 mg per kg of body weight a day in food.

Correct as of November 2026. What the badges mean

Sources

  • Safe Work Australia. Hazardous Chemical Information System (HCIS): classifications for calcium chloride, boric acid, borax, and for N-vinylpyrrolidone, vinyl acetate, ethylene oxide, 1,4-dioxane, hydrazine, aniline, p-toluidine, styrene, chloromethane, carbon monoxide and octamethylcyclotetrasiloxane (D4).
  • European Union. Regulation (EC) 1333/2008 Annex V; Regulation (EU) 231/2012 (food additive specifications); Regulation (EU) 2022/63 (E171); Regulation (EU) 1297/2014 (detergent capsules); Regulation (EC) 790/2009 and Delegated Regulation (EU) 2021/849 (borates); Regulation (EU) 109/2012; Regulation (EU) 2023/2055 (microplastics); Regulation (EU) 2024/1328 (D4, D5, D6); Regulation (EC) 1223/2009 (cosmetics) Annexes III and IV.
  • JECFA (FAO/WHO). Specifications and evaluations: titanium dioxide (2023), sodium carboxymethylcellulose, polyvinylpyrrolidone, Brilliant Blue FCF, tartrazine, Sunset Yellow FCF, D&C Red 33.
  • HSDB (US National Library of Medicine), via PubChem: manufacturing, use and impurity data.
  • Danish EPA. Substances in household detergents (2019).

The full source list is at the end of Chapter 11.