Athanor by arbastro
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How Athanor screens structures and routes for safety

Structures and routes that Athanor generates are screened against the Chemical Weapons Convention schedules and the Australia Group precursor list. Routes to scheduled compounds are refused, and generative requests are rate limited and logged.

Athanor checks what its own models produce before it shows it.

What is screened

  • Predicted products and retrosynthesis routes: every structure a model proposes.
  • Structures the AI generates from a request.
  • The screen tool of the MCP server, which runs the same screen on a structure you give it, as a synthesis target.

What it is checked against

  • The schedules of the Chemical Weapons Convention (CWC).
  • The Australia Group list of chemical weapons precursors.
  • Controlled substance schedules.

What happens to a match

Warning

A route to a scheduled compound is refused, with the reason, and purchasing links are hidden for controlled compounds.

Generative requests are rate limited and logged, so the screen cannot be worked around by asking many times.

MCP serverToolsThe server has 20 tools. Engine tools such as convert, name, properties, depict, check and screen take a structure and answer. Document tools create an Athanor document, edit it atom by atom, and render or export it.Prediction and planningHow Athanor's chemistry predictions workPredictions come from arbastro's own chemistry models, served by arbastro on its own server and listed in Settings › AI. Each prediction shows its confidence and is never presented as a measured fact.

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Last updated Nov 12, 2026