Enter any chemicals and get a risk level, plain-English reasoning, and safety guidance in under a second — powered by 113 substances and real AI fallback.
Four steps, no chemistry background required.
Enter two or more substances — autocomplete suggests all 113 reference chemicals.
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Enter two or more chemicals on the left and click Analyze to see risk level, hazards, and safety guidance here.
Acids, bases, oxidizers, solvents, gases, salts, fuels, metals, halogens, pharmaceuticals, and more — each with CAS number, hazards, uses, and known incompatibilities.
Every feature is designed to answer a high-stakes question correctly the first time.
Every result shows a confidence score reflecting how well-documented the combination is — never falsely reassuring.
No jargon. What may happen, why it happens, and what to do about it — written for non-chemists.
Even without a specific rule, the engine reasons across 14 chemical categories — acids vs. bases, oxidizers vs. fuels.
Precautions, hazards, and the standard disclaimer are always shown — this tool supports, never replaces, professional review.
Copy a summary to clipboard, download a plain-text report, or print a clean report page — all in one click.
Press ⌘K to instantly search all 113 chemicals by name, formula, or alias, and navigate anywhere in the app.
Transparent about what it knows, what it doesn't, and where the line is.
Unknown combinations are reported as Unknown, not Low. Absence of a documented rule is not the same as confirmed safety.
Every result links back to the database entries and interaction rules behind it — you can see exactly why a verdict was reached.
The local engine runs offline. With an API key, calls go directly to Anthropic — nothing routes through our servers.
Interaction rules and hazard data mirror widely published household and laboratory safety guidance, not proprietary models.
The local engine covers 113 chemicals and 22 documented interaction rules. Add your Anthropic API key in Settings (⚙) and Chemiscope will use Claude to analyze any chemical combination you can name — with the same structured output, safety framing, and evidence tabs.
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