About this site

Who

My name is Sergejs Sevcenko. I am a solo developer based in Riga, Latvia, and I build and maintain this site under my company, SIA Basis Assets. There is no editorial team behind it: every tool, every data import and every mistake here is mine, which is also why the site is explicit about where its data comes from and what it does not attempt.

Why

I started this as a long-term project: a set of free, registration-free tools for the people who actually do GHS, EHS and compliance work — label a container, check whether two chemicals can share a shelf, classify a mixture from its composition, pick the precautionary statements that belong on a label and understand why the others do not.

Tools like these exist, but most are locked inside paid suites, and many of the free ones were designed a generation ago: slow, cluttered, and quiet about where their numbers come from. I think the field deserves tools that are fast, open about their sources, and honest about their limits — so that is what I am building.

Where the data comes from

• Harmonised classification — Annex VI to Regulation (EC) No 1272/2008 (CLP), consolidated text, with the amending ATPs traced per entry.
• Physical and safety properties — PubChem Laboratory Chemical Safety Summaries (LCSS), which aggregate NIOSH, NTP, USCG, EPA and ICSC records.
• Reactivity and storage — NOAA CAMEO Chemicals reactive groups, combined with the GHS classes to derive storage segregation.
• Pictograms, statements and transport — UNECE GHS, the CLP annexes, ECHA guidance, and the UN Model Regulations for UN numbers.

A number is printed in a page's prose, summary and structured data only when at least two independent origins agree on it within a tolerance; a single source, or sources that disagree, appear in the properties table with their conditions and nothing more. The rule has a name in the code, consensus-2-sources-1, and an automated check runs it on every build.

The same habit of checking the source against itself is how we found 33 entries in the language editions of Annex VI whose printed substance name does not match the EC and CAS numbers of the same row. They are documented on a dedicated page; 30 of them were reported to ECHA on 10 August 2026, and the EU Publications Office forwarded the submission to the author institution.

What this site does not do

• It is not a substitute for your supplier's safety data sheet. The SDS for the product in your hands is the document that governs; use this site to check it, not to replace it.
• The mixture classifier works from harmonised entries under EU CLP only. It does not yet cover physical hazards, bridging principles, the notes to Annex VI, self-classifications from the C&L Inventory, or jurisdictions other than the EU. Each result page states these limits next to the verdict.
• Substance pages without confirmed property data are kept out of search engines on purpose: a page that only repeats the template is not worth your click.
• Nothing here is legal advice. Where a page cites a regulation, it cites the article, the Official Journal page, or both, so you can read the source yourself.

How it is funded

The tools are free and will stay free. The site earns a commission when a reader chooses to sign up for SDS Manager through a link marked as a partner link; the terms are on the affiliate disclosure page. No partner has any say over the data, the tools or what this site publishes.

Contact

Corrections, questions, and requests from editors, librarians and researchers: [email protected]. If you spot a wrong number, please include the page address and the source you checked it against — that is how most fixes here begin.

SIA Basis Assets · Riga, Latvia · Data protection matters: see the privacy policy.