Prop 65 and Bedroom Chemistry: How Many of the Chemicals We Track Are Actually Listed

If you have bought anything in the last decade, you have seen the sticker: "This product can expose you to chemicals known to the State of California to cause cancer." It is on power cords, luggage, furniture, and mattresses. Most people have learned to read past it, which is a reasonable response to a label that shows up on almost everything. But the list behind that sticker is real, it is specific, and it names chemicals by CAS number. So we did the obvious thing nobody seems to publish: we lined up our atlas against it.

What a Prop 65 listing actually is

Proposition 65 is a 1986 California law, formally the Safe Drinking Water and Toxic Enforcement Act. It requires the state to keep a published list of chemicals it considers capable of causing cancer or reproductive harm, and it requires businesses to warn before they knowingly expose people to those chemicals. The list has roughly 900 entries and is revised at least once a year. Regulatory — OEHHA

A chemical gets on the list through one of a few doors. Most often an authoritative scientific body has already classified it: the International Agency for Research on Cancer, the US National Toxicology Program, or the US EPA. Sometimes California's own qualified experts add it. Sometimes federal law already requires the chemical to be labeled, and the state adopts that. The important part for reading the list honestly is that a listing is a statement about the chemical's hazard, which is its capacity to cause harm at some dose. It is not a statement about the risk from any particular product, which depends on how much of the chemical actually reaches you.

The 89 listed compounds in the Atlas

Here is every compound we track that carries a Proposition 65 listing, sorted so the ones listed for both cancer and reproductive harm come first. Each name links to its atlas page, where the bedroom-relevant exposure and its evidence tier are covered in full. The year is when the listing took effect. Regulatory — OEHHA

Compiled by matching each atlas compound's CAS number, then name, against the OEHHA Proposition 65 list (December 2025 version). Delisted chemicals are excluded. Metals that California lists as a family, such as lead and arsenic, are shown with the endpoints from their combined listings. Regulatory — OEHHA

What the list does not tell you

This is the part that keeps the table honest, and it is the reason we publish the caveats as prominently as the count.

A listing does not mean the chemical is present in your mattress. It means the chemical is capable of causing harm and has been formally identified. Whether it is in your bedroom, at what concentration, and whether it reaches you, are separate questions. That is what the individual atlas pages are for, and it is why we tag every claim with an evidence tier rather than treating "listed" as the end of the story.

A listing also does not mean your exposure is unsafe. California triggers a warning above a "safe harbor" level, and those levels are set to be protective, not realistic-worst-case. For a carcinogen the No Significant Risk Level is the dose expected to cause no more than one additional cancer in 100,000 people exposed every day for 70 years. Regulatory — OEHHA NSRL/MADL A label tells you the exposure crossed that cautious line somewhere, not that it is high.

And the reverse trap is just as real: a compound being absent from the list does not make it safe. Prop 65 is a California program with its own criteria and its own backlog. Plenty of chemicals worth understanding are not on it, and being un-listed is not a clean bill of health. The 2018 coffee episode, where naturally occurring acrylamide in a brewed cup triggered cancer warnings until the state stepped in to clarify coffee, is the standing reminder that the presence or absence of a warning is a legal signal, not a risk measurement.

How to use it without scaring yourself

The list is most useful as an index, not a verdict. If a compound shows up in your bedroom and it is on this table, that is a reason to read its atlas page and understand the real exposure route, not a reason to panic about a sticker. If it is not on the table, that is not permission to stop thinking. The value of joining the two is that it turns a wall of identical warning labels back into 89 specific, named chemicals you can actually look up.

We will keep this in sync as California revises the list and as the atlas grows. For the chemistry behind any single entry, start with the Bedroom Chemistry Atlas; for how a chemical earns its way onto a regulatory list in the first place, the Regulatory Tracker follows the active proceedings.

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Embr is an independent, evidence-tiered guide to the chemistry of the home. We have no affiliate relationships and no financial stake in what you buy. This piece reports a regulatory fact and links to primary sources so you can check it yourself.