Cesium safety data
GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.
GHS classification
Pictograms, signal word and hazard classes of the GHS classification
Hazard classes and categories
- Water-react. 1
- Skin Corr. 1
- Eye Dam. 1
Hazard statements
H codes grouped by type. Percentages show the share of classification notifications that report the statement
Physical hazards
- H260In contact with water releases flammable gases which may ignite spontaneously.
Health hazards
- H314Causes severe skin burns and eye damage.
- H318Causes serious eye damage.
Precautionary statements
P codes for prevention, response, storage and disposal
Prevention
- P223Do not allow contact with water.
- P231 + P232Handle and store contents under inert gas. Protect from moisture.
- P260Do not breathe dust, fume, gas, mist, vapours or spray.
- P264Wash skin thoroughly after handling.
- P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
- P280Wear protective gloves, protective clothing, eye protection and face protection.
Response
- P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
- P302 + P335 + P334If on skin: Brush off loose particles from skin. Immerse in cool water or wrap in wet bandages.
- P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
- P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
- P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
- P316Get emergency medical help immediately.
- P317Get medical help.
- P321Specific treatment (see supplemental first aid instructions on the label).
- P363Wash contaminated clothing before reuse.
- P370 + P378In case of fire: Use appropriate media to extinguish.
Storage
- P402 + P404Store in a dry place. Store in a closed container.
- P405Store locked up.
Disposal
- P501Dispose of contents and container in accordance with local regulations.
Handling, storage and disposal
Summaries only, follow the supplier SDS for your grade
Safe handling
Wear positive pressure self-contained breathing apparatus (SCBA). Wear chemical protective clothing that is specifically recommended by the manufacturer when there is NO RISK OF FIRE. Structural firefighters' protective clothing provides thermal protection but only limited chemical protection.
Storage
Keep immersed in mineral oil.
Exposure limits and toxicity
Occupational exposure limits and toxicity data
Cesium is a naturally occurring element found combined with other elements in rocks, soil, and dust in low amounts. Naturally occurring cesium is not radioactive and is referred to as stable cesium. There is only one stable form of cesium naturally present in the environment,133Cs (read as cesium one-thirty-three). Nuclear explosions or the breakdown of uranium in fuel elements can produce two radioactive forms of cesium,134Cs and137Cs. Both isotopes decay into non-radioactive elements.134Cs and137Cs generate beta particles as they decay. It takes about 2 years for half of134Cs to give off its radiation and about 30 years for137Cs, this is called the halflife.
Transport information
UN dangerous goods classification for road, sea and air
- UN number
- UN 1407
- Transport hazard class
- 4.3
- Packing group
- I
Shipping rules depend on mode, quantity and packaging. Confirm the classification with the supplier SDS and your freight forwarder.
Supplier safety data sheets
SDS documents uploaded by suppliers who list this chemical
No supplier has uploaded an SDS for Cesium yet. Suppliers usually send one with their quote. Request quotes
Safety questions
Quick answers about handling Cesium safely
Is Cesium hazardous?
Which GHS pictograms apply to Cesium?
What is the UN number of Cesium?
How should Cesium be stored?
Where can I get the SDS for Cesium?
GHS classification summary, not an SDS. Always check the supplier's SDS. Last updated 7 Oct 2026. Report an error