Where the data comes from
Every scientific value on this site carries its origin. This page names the databases behind it, as their licences require.
Data
PubChem — National Library of Medicine, NIH
Compound identity, synonyms, and both computed and experimental properties, shown as Verified with the reporting source named.
PubChem data are in the public domain in the United States. Retrieval respects PubChem's usage policy, including rate limiting and caching.
The Open Reaction Database
Experimental reaction records: participants, conditions, measured yields and references.
Licensed CC BY-SA 4.0. Attribution is required, and adaptations of the data must be shared under the same licence.
Visit The Open Reaction DatabaseRead the CC BY-SA 4.0 licence
How to read a value
A value is Verified when it comes from an authoritative record, Rule-derived when it was calculated deterministically from the structure, Predicted when a model produced it, and Unknown when there is not enough evidence to say. Each value states the method that produced it, and nothing is estimated silently.
That distinction is the point of the whole platform rather than a disclaimer on it. A measured boiling point and a calculated partition coefficient are different kinds of statement, and a tool that prints them in the same typeface is hiding the only thing that matters about them.
Where to next
How to read a mechanism
What the arrows claim, and how to check one rather than believe it.
A record with its sources
Measured values naming the database that published each, beside calculated ones.
Questions, answered honestly
What the platform does, what it does not, and how good the predictions actually are.