Access Chemical Safety Data and Hazard Information
Retrieve safety data sheet information including hazard classifications, handling precautions, and emergency procedures for any chemical.
Look Up Chemical Compound Properties
Identify chemical compounds by name, CAS number, or SMILES string and retrieve molecular weight, formula, and structure data.
Quick answer: Use the Chemistry Lookup tool through ToolRouter to look up chemical compound properties directly from Claude, ChatGPT, Microsoft Copilot, and OpenClaw — connect once, then drive it with plain-language prompts. No code required.
ToolWorking with an unfamiliar compound and needing its molecular weight, formula, or InChI key means hunting across multiple chemistry databases, most of which require account registration or show inconsistent data. Researchers, lab technicians, and students waste real time on a task that should take seconds.
The compound_lookup and search_compounds skills query PubChem — one of the most comprehensive publicly available chemistry databases — returning molecular formula, molecular weight, IUPAC name, InChI key, canonical SMILES, and structural identifiers for any compound. Search by name, CAS number, SMILES, or synonym.
Chemistry students verifying compound properties, lab technicians identifying unknown substances, pharmaceutical researchers checking structural data, and educators building chemistry curricula all use this to get authoritative compound data without database subscriptions.
How to look up chemical compound properties with Claude, ChatGPT, Microsoft Copilot, and OpenClaw
Connect ToolRouter
1Open connector settings Open Settings
2Add a custom connector with these details
Name
ToolRouterURL
https://api.toolrouter.com/mcp3Let Claude set you up Open Claude
Claude combines compound lookup results with explanations of what the properties mean — why a particular molecular weight matters for a synthesis, what a SMILES string encodes structurally, or how two similar compounds differ in their properties. It bridges the gap between raw data and chemical understanding.
How to look up chemical compound properties
Once connected (see setup above), use the Chemistry Lookup tool — the same steps work with Claude, ChatGPT, Microsoft Copilot, OpenClaw, and any MCP client:
- Ask: "Look up aspirin using chemistry-lookup"
- Claude returns molecular formula, weight, SMILES, and structural identifiers
- Ask: "What does this molecular formula tell us about aspirin's structure?"
- Request: "Find similar compounds to aspirin using chemistry-lookup"
Example prompt
Try this with the Chemistry Lookup tool
Look up ibuprofen using chemistry-lookup. Return the molecular formula, weight, IUPAC name, and CAS number. Then explain what the structure tells us about how it behaves as an anti-inflammatory.
Tips
- Use the IUPAC name lookup when you only have a common trade name for a compound
- Ask Claude to explain the significance of specific structural features (functional groups, ring systems)
- Search by CAS number for unambiguous identification when names are ambiguous
Frequently Asked Questions
How do I look up chemical compound properties with an AI assistant?
Identify chemical compounds by name, CAS number, or SMILES string and retrieve molecular weight, formula, and structure data. Connect the Chemistry Lookup tool to Claude, ChatGPT, Microsoft Copilot, and OpenClaw through ToolRouter, then ask the assistant in plain language. For example: Ask: "Look up aspirin using chemistry-lookup" Claude returns molecular formula, weight, SMILES, and structural identifiers
Which AI assistants can look up chemical compound properties?
Claude, ChatGPT, Microsoft Copilot, and OpenClaw can all look up chemical compound properties using the Chemistry Lookup tool through ToolRouter, with no API keys or coding required.
What does the Chemistry Lookup tool do?
Look up chemical compounds, elements, safety data sheets, and molecular properties.
Related Use Cases
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Get detailed properties for any element and compare elements side by side across physical, chemical, and electronic characteristics.