What "non-toxic" actually means on a cleaning label

Walk down the cleaning aisle and count how many bottles say non-toxic. Then try to find out what any of them mean by it. You will not be able to, because there is nothing to find out.

There is no legal definition

No United States agency defines non-toxic for household cleaning products. The EPA does not. The FDA does not, because cleaning products are not food or drugs. The Consumer Product Safety Commission regulates specific hazards and required warning labels, but it does not certify the absence of hazard. Nobody hands out a non-toxic badge, because nobody issues one.

The closest thing to a rule is the Federal Trade Commission's Green Guides, which cover environmental marketing claims. On non-toxic specifically, the guidance is unusually direct: a general claim that a product is non-toxic likely conveys that it is non-toxic both for people and for the environment, and a marketer needs competent and reliable scientific evidence to support that. It is a genuinely high bar. Very few products on any shelf could actually meet it, and yet a great many of them make the claim.

Why the claim is nearly impossible to substantiate

Toxicity is not a property a substance has or lacks. It is a relationship between a dose, a route of exposure, a duration and an organism. Table salt has a measurable oral toxicity. Water can kill you at a sufficient volume. The useful question is never "is this toxic" but "at what exposure, to whom, and how often".

That is why we do not answer the non-toxic question with a yes. We answer it with a list. Here is what is in the bottle, here is where each ingredient comes from, here is what it is doing, and here is the honest caveat.

Three phrases worth translating

• Plant-based. Usually means the surfactant was derived from a plant feedstock, typically coconut, palm kernel or corn. It says nothing about what happened to that feedstock chemically afterwards, and nothing about the rest of the formulation.
• Chemical-free. Meaningless. Water is a chemical. If a label says this, the company has told you something useful about its marketing department and nothing about its product.
• Natural. Unregulated for cleaning products. Petroleum is natural. Asbestos is natural. The word is doing emotional work, not chemical work.

What to look for instead

Three things carry more information than any adjective on the front of a bottle.

A full ingredient list. Cleaning products are not required to disclose every ingredient the way food is, and fragrance in particular can lawfully stand for dozens of undisclosed substances behind a single word. A company that publishes the whole list voluntarily has made a decision you can check.

A third-party programme with published criteria. EPA Safer Choice reviews every intentionally added ingredient against a list of safer chemistry. Green Seal's GS-37 standard covers toxicity, biodegradability, VOC content and packaging. Neither is a guarantee of safety in your specific house, but both are considerably better than a leaf printed on a label.

An EPA registration number, if a disinfection claim is being made. Any product claiming to kill a pathogen is a pesticide under United States law and must be registered. A product making disinfection claims without a registration number is either not disinfecting or not complying.

Where we land

We still use the phrase non-toxic on this site, and we are aware of the tension in that. It is the phrase people search for when they are worried about what gets sprayed near their children, and refusing to use it would mostly mean not being found by the people this company exists for.

What we do about it is publish the list. Every product, every intentionally added ingredient, every source, and the one product in our kit that is synthesised rather than plant-derived. If the phrase is a starting point for a conversation rather than the end of one, it is doing no harm.

The full ingredient lists are here, including the honest caveat on each one.