About
Who builds this, and how it is checked.
ZeroResidue (zeroresidue.io) is a free chemical safety and regulatory compliance reference site built and maintained by SubstanceWorks AI (2780017 Alberta Inc.). Every tool is verified against primary sources and updated as the regulations change. We do not give advice or required regulatory language. We give you a fast, accurate reference, and we show our work.
Why is this free?
These tools are built and maintained by a chemical compliance software company. We keep them free and open because accurate regulatory reference should be easy to reach. There is no login, nothing is gated, and we do not sell your data.
How a result is checked
Every tool runs on published reference data baked into the site when it is built, so the same inputs give the same result every time and nothing is asked of a language model.
Every result names the list or provision it checked, and the scope note tells you what the tool did not look at.