What is new and what changed on Cheméo, most recent first.
2026-07-16
New
- Search for mixtures by their components. A search like "methanol water"
now finds the mixtures that contain both, alongside the pure compounds.
Component synonyms are matched too, so "methanol" finds mixtures listed under
"Methyl Alcohol". Mixtures appear in their own section on the results page,
each linking to its mixture page.
Improved
- Faster "similar compounds". The list of similar compounds on every
compound page is computed noticeably faster.
- Worklist checks entries. Adding a compound or mixture to a worklist now
confirms it exists first, and each list has a size limit.
- Style and script updates apply right away. After an update you no longer
need to force-refresh the page to get the latest styling or behaviour.
2026-07-15
Changed
- Updated property database (v17). Predicted values are now stored next to
the experimental data for the same property, so predictions are available even
where measurements are sparse. Displayed averages and ranges continue to use
the experimental data.
API
- Request rate limits. The public API now allows up to 120 requests per
minute, with short bursts of up to 30, and reports the current limit in
standard
RateLimit response headers so clients can pace themselves.
2026-07-14
Changed
- A refreshed look. Cheméo has a cleaner, modern design: refreshed styling
throughout, clearer and easier-to-read property tables, crisp icons, and a
layout that makes better use of wide screens.
