Selenium dioxide 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
- Acute Tox. 3 (oral)
- Skin Corr. 1
- Eye Dam. 1
- Acute Tox. 3 (inhalation)
- STOT RE 2
- Aquatic Acute 1
- Aquatic Chronic 1
Hazard statements
H codes grouped by type. Percentages show the share of classification notifications that report the statement
Health hazards
- H301Toxic if swallowed.
- H314Causes severe skin burns and eye damage.
- H318Causes serious eye damage.
- H331Toxic if inhaled.
- H373May cause damage to organs through prolonged or repeated exposure.
Environmental hazards
- H400Very toxic to aquatic life.
- H410Very toxic to aquatic life with long lasting effects.
Precautionary statements
P codes for prevention, response, storage and disposal
Prevention
- P260Do not breathe dust, fume, gas, mist, vapours or spray.
- P261Avoid breathing dust, fume, gas, mist, vapours or spray.
- P264Wash skin thoroughly after handling.
- P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
- P270Do not eat, drink or smoke when using this product.
- P271Use only outdoors or in a well-ventilated area.
- P273Avoid release to the environment.
- P280Wear protective gloves, protective clothing, eye protection and face protection.
Response
- P301 + P316If swallowed: Get emergency medical help immediately.
- P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
- 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.
- P319Get medical help if you feel unwell.
- P321Specific treatment (see supplemental first aid instructions on the label).
- P330Rinse mouth.
- P363Wash contaminated clothing before reuse.
- P391Collect spillage.
Storage
- P403 + P233Store in a well-ventilated place. Keep container tightly closed.
- P405Store locked up.
Disposal
- P501Dispose of contents and container in accordance with local regulations.
First aid
General first aid measures. Get medical advice if you feel unwell
Handling, storage and disposal
Summaries only, follow the supplier SDS for your grade
Safe handling
General: PREVENT DISPERSION OF DUST! STRICT HYGIENE!
Inhalation: Use local exhaust or breathing protection.
Skin: Protective gloves. Protective clothing.
Eyes: Wear face shield or eye protection in combination with breathing protection.
Ingestion: Do not eat, drink, or smoke during work. Wash hands before eating.
Storage
Separated from food and feedstuffs. Dry.
Disposal
Generators of waste (equal to or greater than 100 kg/mo) containing this contaminant, EPA hazardous waste number D010, U204, must conform with USEPA regulations in storage, transportation, treatment and disposal of waste.
Exposure limits and toxicity
Occupational exposure limits and toxicity data
- ACGIH TLV
- 8 hr Time Weighted Avg (TWA): 0.2 mg/cu m. /Selenium and compounds, as Se/
Short-term exposure: The substance is corrosive to the eyes, skin and respiratory tract. Inhalation may cause lung oedema. The substance may cause effects on the eyes. This may result in allergic-type reaction of the eyelids (rose eye). Medical observation is indicated. Long-term exposure: Repeated or prolonged contact may cause skin sensitization. The substance may have effects on the respiratory tract, gastrointestinal tract, central nervous system and liver. This may result in nasal irritation, persistent garlic odour, stomach pain, nervousness and liver impairment.
Transport information
UN dangerous goods classification for road, sea and air
- UN number
- UN 3283
- Transport hazard class
- 6.1
- Packing group
- II
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 Selenium dioxide yet. Suppliers usually send one with their quote. Request quotes
Safety questions
Quick answers about handling Selenium dioxide safely
Is Selenium dioxide hazardous?
Which GHS pictograms apply to Selenium dioxide?
What is the UN number of Selenium dioxide?
How should Selenium dioxide be stored?
Where can I get the SDS for Selenium dioxide?
GHS classification summary, not an SDS. Always check the supplier's SDS. Last updated 7 Oct 2026. Report an error