Meet Rex

Ask Rex About the Chemicals at Your Organization.

Rex is mSDS Source’s built-in AI assistant. Ask a question the way you’d ask a coworker - about PPE, storage, first aid, or your SDS records - and get an answer pulled straight from your own library.

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Included at no extra cost with every mSDS Source subscription.

Ask Rex

find me a safer alternative for brake cleaner

Searching SDS databases

I found one strong candidate in your library. Let me now look at the most relevant alternative — Green Wash 200 Parts Washer — which is specifically designed for cleaning metal parts, the same application as brake cleaner.

Here’s a full analysis:

🔍 Original Product: Acme Brake & Parts Cleaner — Acme Industrial Supply

Intended use: Cleaning brake and mechanical parts Key hazards (from SDS):

⚠️ Flammable, Irritant, Gas (pressurized aerosol)
Primary ingredient: Heptane-based hydrocarbons (60–100%) — a petroleum-derived VOC solvent
Also contains: Isopropanol (1–5%), Carbon Dioxide propellant (1–5%)
Health risks: Moderate-to-severe skin and eye irritant; CNS depression at high concentrations; chronic exposure linked to organ, brain, and nervous system damage; aspiration hazard if ingested

What Rex Can Do.

No special training required — ask Rex the way you'd ask a coworker, and it answers using the SDSs already in your account.

Everyday questions

Everyday Safety Questions

Keep your library current

Compliance & Library Audits

Know what's in your building

Substance & Ingredient Search

Go Deeper into Chemical Compliance with Rex

Rex can answer more complex questions like build a storage matrix, rank hazards across your whole library, or draft a Safe Work Procedure. Those larger jobs are part of an optional upgrade — everyday questions like the ones above are covered from day one, at no extra cost.

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Frequently Asked Questions

Still Have Questions?

Send us an email, and our team will get back to you with more information.

What Is Rex?

Rex is the AI assistant built into mSDS Source. Ask it a plain-language question about a chemical, a product, or your SDS library, and it answers using the safety data sheet documents already in your account.

Does Rex Cost Extra?

No. Everyday questions are included at no extra cost with every mSDS Source subscription. Larger jobs, like building a storage matrix, ranking hazards across your whole library or drafting a Safe Work Procedure, are part of an optional upgrade.

Is Rex’s Information Specific to My Company, or General Safety Advice?

Rex answers from the SDSs in your own mSDS Source library, so its answers reflect the exact products and versions your team uses, and it points you to the SDS section it used.

Can Rex Break Down Results by Building or Department?

Yes. Rex uses the locations and departments already set up in your library, so you can ask about a single building, lab or department, or across your whole organization.

Do I Need a Safety Background to Use Rex?

No. Ask Rex the way you’d ask a coworker. It is built for everyone on your team, from new hires to EHS managers, and needs no special training.