Free Lab Chemical Label Generator
Make and print labels for prepared solutions and reagents (name, concentration, date, who made it, hazards) and peroxide-forming chemicals (received, opened, test-or-discard-by date, test log). Vial to jug sizes, English or bilingual English/Spanish. No account required.
Last updated
Copy them from the stock chemical’s SDS, Section 2.
Clear the date or initials to print a write-in line.
Live Preview
⚠ Important — Read before you print
- This tool is provided as a utility only, on an "as is" basis, with no warranty of accuracy, completeness, or fitness for any particular purpose.
- It is not legal, regulatory, or EHS advice. You are solely responsible for verifying that any label you generate is accurate and complete for your specific product and use.
- You must ensure compliance with OSHA HCS 2024 (29 CFR 1910.1200) and any other applicable federal, state, local, or international regulations (e.g. DOT, EPA, GHS Rev.10).
- Always cross-check generated content against the manufacturer's current Safety Data Sheet (SDS).
- Tellus EHS, Inc. and its affiliates are not liable for any damages, injuries, fines, or losses arising from use of this tool or any label generated by it.
See the full Free Tool Terms & Disclaimer.
Still needed: the solution name.
More Free Tools
Labeling the stock bottles and the waste too?
Running your lab’s chemical list in a spreadsheet?
Tellus keeps every chemical in your lab, its SDS, and its labels in one place. Free to start.
Get Started Free — no credit card requiredWhat goes on a lab chemical label?
Labs make their own containers all day: dilutions, buffers, aliquots, stock solutions. Each one needs a label that tells the next person what is inside and how dangerous it is. Peroxide formers need one more thing: dates, because they become more dangerous after opening.
Prepared solutions and reagents
- Chemical name and concentration (and the solvent)
- Hazards: signal word, GHS pictograms, or a hazard statement
- Date prepared and the preparer’s initials
- A use-by date if the solution degrades
Peroxide-forming chemicals
- Date received and date opened
- Test-or-discard-by date, from your program’s interval
- A test log: date, peroxide result, initials
- A warning not to distill or evaporate without testing
Peroxide former classes and common intervals
| Class | Examples | Common test-or-discard interval |
|---|---|---|
| A: hazard on storage | Isopropyl ether, divinyl acetylene, potassium metal, sodium amide | 3 months after opening |
| B: hazard on concentration | Diethyl ether, THF, 1,4-dioxane, cumene, cyclohexene | 12 months after opening (6 in many programs) |
| C: polymerization hazard | Styrene, vinyl acetate, methyl methacrylate, butadiene | 12 months if inhibited; 24 hours if not |
Intervals vary by institution. Your chemical hygiene plan and the chemical’s SDS take precedence.
How to make a lab label with this free tool
- 1
Choose the label
Pick a prepared-solution label for anything you mix, dilute, or aliquot, or a peroxide-former label for chemicals that form explosive peroxides after opening.
- 2
Fill in the chemical
For a solution: name, concentration, solvent, date prepared, your initials, an optional use-by date, and the hazards. For a peroxide former: the chemical, its class, and the received and opened dates.
- 3
Check the dates
For peroxide formers the tool works out the test-or-discard-by date from the opened date and the interval. The interval defaults by class and you can change it to match your chemical hygiene plan.
- 4
Download the print-ready PDF
Pick a size (1″ × 2.625″ for vials, 2″ × 4″ for bottles, 3.33″ × 4″ for jugs) and download. Email is optional.
Each label downloads as a one-label PDF sized to the stock you picked. Print at 100% / actual size, not “fit to page”. For freezers, solvents and water baths, print on synthetic or cryo label stock.
Frequently asked questions
What should be on a prepared solution label?+
At minimum the chemical name and concentration and the main hazards, so anyone who picks it up knows what it is and how dangerous it is. Most labs also add the solvent, the date it was made, the preparer’s initials, and a use-by date. Your chemical hygiene plan may set the exact fields. If a solution leaves your control (another lab or a shared stockroom), treat it as a regular secondary container and label it fully.
Which chemicals are peroxide formers?+
Common ones include diethyl ether, tetrahydrofuran (THF), 1,4-dioxane, isopropyl ether, cumene, cyclohexene, and monomers such as styrene and vinyl acetate. Lists group them into classes by how the hazard develops: on storage alone (Class A), when concentrated by distillation or evaporation (Class B), or by hazardous polymerization (Class C). Check the SDS and your institution’s list.
How often should peroxide formers be tested or discarded?+
It depends on the class and your institution. Commonly used defaults are 3 months after opening for Class A, 12 months after opening for Class B, 12 months for inhibited Class C monomers, and 24 hours for uninhibited ones. Many programs are stricter (6 months for Class B is common). This tool uses those defaults and lets you change them. Your chemical hygiene plan sets the real interval.
Why date peroxide formers on receipt and on opening?+
Peroxides build up once the container is opened and air gets in, and the inhibitor is used up over time even in sealed containers. The received date tells you the age of the stock; the opened date starts the test-or-discard clock. Never open or move an old container that has crystals around the cap: call your safety officer.
Can I make these labels in Spanish?+
Yes, as a bilingual label: every caption and the peroxide warning print in English and Spanish. Type the chemical name in whichever language your lab uses.
Is this tool free?+
Yes. Make and download as many lab labels as you need with no account, no payment, and no usage limits.