Educational content for trained professionals. Not a Safety Data Sheet, not medical advice. In an emergency, call your local poison control or emergency services immediately. Terms of use.
Cyclobenzaprine
Also known as: cyclobenzaprine · 303-53-7 · Proheptatriene · Proheptatrien
- CAS No.
- 303-53-7
- Formula
- C20H21N
- Molar mass
- 275.4 g/mol
- PubChem CID
- 2895
Toxic
Harmful / Irritant
Summary
Cyclobenzaprine (C20H21N), CAS 303-53-7. Common in labs and industry. Read on for hazards, storage, PPE and mixing rules.
Background
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Hazards
May be fatal even in small doses.
May cause skin, eye or respiratory irritation.
Hazard statements
- H301: Toxic if swallowed [Danger Acute toxicity, oral]
- H312: Harmful in contact with skin [Warning Acute toxicity, dermal]
- H332: Harmful if inhaled [Warning Acute toxicity, inhalation]
Storage
Keep at room temperature, below 30 °C, out of direct heat.
Store somewhere well-ventilated and away from any ignition source.
Metal drums or tinted glass, tightly sealed.
Strong acids, strong bases and powerful oxidizers.
Personal protective equipment
Nitrile or butyl, at least 0.4 mm thick.
Safety goggles with side shields.
A2 organic-vapor cartridge if the room isn't well ventilated.
Occupational exposure limits (HSE)
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EU harmonised classification (ECHA C&L)
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Transport
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FDA recalls & enforcement
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Compatibilities
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Open comparator with CyclobenzaprinePractical safety notes
- Acute toxicity. Work under a fume hood, restrict access, keep a specific antidote plan available.
- Irritant / harmful. Ventilate the workspace and avoid skin contact.
Derived from the GHS classification shown above. These notes are generic guidance and do not replace the manufacturer's SDS or your local risk assessment.
FAQ
Is Cyclobenzaprine flammable?+
Cyclobenzaprine (CAS 303-53-7) does not carry the GHS02 flame pictogram in our records. Always confirm with the manufacturer's SDS section 9 (flash point) before assuming a product is non-flammable.
What PPE should I wear when handling Cyclobenzaprine?+
Safety glasses with side shields and nitrile gloves are the baseline. Work inside a fume hood or use a suitable respirator. Check SDS section 8 for material-specific breakthrough times.
How should Cyclobenzaprine be stored?+
Store Cyclobenzaprine (CAS 303-53-7) in tightly closed original containers, in a cool, dry, well-ventilated area away from incompatible materials.
Is Cyclobenzaprine dangerous for the environment?+
No specific environmental pictogram (GHS09) is listed in our records for Cyclobenzaprine, but any chemical waste should be handled through your site's hazardous-waste procedure, not poured down the drain.
Where can I find the official Safety Data Sheet for Cyclobenzaprine?+
Official, up-to-date SDS documents are published by each manufacturer (Sigma-Aldrich, Merck, Thermo Fisher, VWR, Carl Roth, etc.) and by regulators such as ECHA and NIOSH. This page is an educational summary and does not replace the manufacturer's SDS.
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Reference information only. Not a Safety Data Sheet. Always consult the manufacturer's official SDS and your local regulations before handling, storing or transporting any chemical. Terms of use.