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Sulfates and sulfur salts

Selenium safety data

GHS hazards, precautions, first aid, handling and transport for Selenium. A classification summary, not a safety data sheet.
CAS 7782-49-2Formula Se

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

GHS06: Acute toxicity (severe)
Acute toxicity (severe)
GHS08: Serious health hazard
Serious health hazard
Signal word
Danger

Hazard classes and categories

  • Acute Tox. 3 (oral)
  • Acute Tox. 3 (inhalation)
  • STOT RE 2
  • Aquatic Chronic 4

Hazard statements

H codes grouped by type. Percentages show the share of classification notifications that report the statement

Health hazards

  • H301Toxic if swallowed.
  • H331Toxic if inhaled.
  • H373May cause damage to organs through prolonged or repeated exposure.

Environmental hazards

  • H413May cause long lasting harmful effects to aquatic life.

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.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P273Avoid release to the environment.

Response

  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P316Get emergency medical help immediately.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.

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

If inhaled
Respiratory support.
Skin contact
If this chemical contacts the skin, immediately wash the contaminated skin with soap and water. If this chemical penetrates the clothing, immediately remove the clothing, wash the skin with soap and water, and get medical attention promptly.
Eye contact
If this chemical contacts the eyes, immediately wash (irrigate) the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately.
If swallowed
If this chemical has been swallowed, get medical attention immediately.

Handling, storage and disposal

Summaries only, follow the supplier SDS for your grade

Safe handling

Fire: NO open flames. NO contact with oxidizing agents.

General: STRICT HYGIENE!

Inhalation: Use ventilation, local exhaust or breathing protection.

Skin: Protective gloves.

Eyes: Wear safety spectacles or eye protection in combination with breathing protection.

Ingestion: Do not eat, drink, or smoke during work.

Storage

Separated from strong oxidants, strong acids and food and feedstuffs. Dry. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing.

Disposal

Generators of waste (equal to or greater than 100 kg/mo) containing this contaminant, EPA hazardous waste number D010, must conform with USEPA regulations in storage, transportation, treatment and disposal of waste. SRP: Wastewater from contaminant suppression, cleaning of protective clothing/equipment, or contaminated sites should be contained and evaluated for subject chemical or decomposition product concentrations. Concentrations shall be lower than applicable environmental discharge or disposal criteria. Alternatively, pretreatment and/or discharge to a permitted wastewater treatment facility is acceptable only after review by the governing authority and assurance that "pass through" violations will not occur. Due consideration shall be given to remediation worker exposure (inhalation, dermal and ingestion) as well as fate during treatment, transfer and disposal.

Exposure limits and toxicity

Occupational exposure limits and toxicity data

OSHA PEL, 8-hour TWA
0.2 mg/m³
NIOSH REL, TWA
0.2 mg/m³
ACGIH TLV, 8-hour TWA
0.2 mg/m³
IDLH
1 mg/m3 (as Se)

Short-term exposure: The substance is irritating to the respiratory tract. The substance may cause effects on the gastrointestinal tract and nervous system. Long-term exposure: The substance may have effects on the respiratory tract, gastrointestinal tract and skin.

Transport information

UN dangerous goods classification for road, sea and air

UN number
UN 3283

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 yet. Suppliers usually send one with their quote. Request quotes

Safety questions

Quick answers about handling Selenium safely

Is Selenium hazardous?

Selenium carries the GHS signal word "Danger". Main hazards: toxic if swallowed, toxic if inhaled, may cause damage to organs through prolonged or repeated exposure. This summary is not an SDS, always read the supplier safety data sheet.

Which GHS pictograms apply to Selenium?

The GHS classification of Selenium shows 2 pictograms: GHS06 (acute toxicity (severe)), GHS08 (serious health hazard).

What is the UN number of Selenium?

Selenium is transported under UN 3283. Check the supplier SDS and the current ADR, IMDG or IATA rules before shipping.

How should Selenium be stored?

Separated from strong oxidants, strong acids and food and feedstuffs. Dry. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing.

Where can I get the SDS for Selenium?

Ask the supplier for the safety data sheet of the exact grade you buy. Suppliers on CompoundList can attach their SDS to listings and send it with a quote. This page is a GHS classification summary, not an SDS.

GHS classification summary, not an SDS. Always check the supplier's SDS. Last updated 7 Oct 2026. Report an error

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