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Aromatics

Mesitylene safety data

GHS hazards, precautions, first aid, handling and transport for Mesitylene. A classification summary, not a safety data sheet.
CAS 108-67-8Formula C9H12

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

GHS02: Flammable
Flammable
GHS07: Harmful or irritant
Harmful or irritant
GHS09: Hazardous to the environment
Hazardous to the environment
Signal word
Warning
220
NFPA 704 rating
health, fire, reactivity

Hazard classes and categories

  • Flam. Liq. 3
  • STOT SE 3 (respiratory irritation)
  • Aquatic Chronic 2

Hazard statements

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

Physical hazards

  • H226Flammable liquid and vapour.

Health hazards

  • H335May cause respiratory irritation.

Environmental hazards

  • H411Toxic to aquatic life with long lasting effects.

Precautionary statements

P codes for prevention, response, storage and disposal

Prevention

  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P233Keep container tightly closed.
  • P240Ground and bond container and receiving equipment.
  • P241Use explosion-proof electrical, ventilating and lighting equipment.
  • P242Use non-sparking tools.
  • P243Take action to prevent static discharges.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • 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

  • P303 + P361 + P353If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P319Get medical help if you feel unwell.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P391Collect spillage.

Storage

  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P403 + P235Store in a well-ventilated place. Keep cool.
  • 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, wash the contaminated skin with soap and water.
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 sparks and NO smoking. Above 50 °C use a closed system, ventilation and explosion-proof electrical equipment. Prevent build-up of electrostatic charges (e.g., by grounding).

General: PREVENT GENERATION OF MISTS!

Inhalation: Use ventilation, local exhaust or breathing protection.

Skin: Protective gloves.

Eyes: Wear safety spectacles.

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

Storage

Fireproof. Separated from strong oxidants. Well closed. Keep in a well-ventilated room.

Disposal

Incineration /SRP: with appropriate emission controls/.

Exposure limits and toxicity

Occupational exposure limits and toxicity data

NIOSH REL
TWA 25 ppm (125 mg/m3)

Short-term exposure: The substance is irritating to the eyes, skin and respiratory tract. If this liquid is swallowed, aspiration into the lungs may result in chemical pneumonitis. The substance may cause effects on the central nervous system. Long-term exposure: The substance defats the skin, which may cause dryness or cracking. Repeated or prolonged inhalation may cause effects on the lungs. This may result in chronic bronchitis. The substance may have effects on the central nervous system and blood.

Transport information

UN dangerous goods classification for road, sea and air

UN number
UN 2325
Transport hazard class
3
Packing group
III

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

Safety questions

Quick answers about handling Mesitylene safely

Is Mesitylene hazardous?

Mesitylene carries the GHS signal word "Warning". Main hazards: flammable liquid and vapour, may cause respiratory irritation, toxic to aquatic life with long lasting effects. This summary is not an SDS, always read the supplier safety data sheet.

Which GHS pictograms apply to Mesitylene?

The GHS classification of Mesitylene shows 3 pictograms: GHS02 (flammable), GHS07 (harmful or irritant), GHS09 (hazardous to the environment).

What is the UN number of Mesitylene?

Mesitylene is transported under UN 2325, hazard class 3, packing group III. Check the supplier SDS and the current ADR, IMDG or IATA rules before shipping.

How should Mesitylene be stored?

Fireproof. Separated from strong oxidants. Well closed. Keep in a well-ventilated room.

Where can I get the SDS for Mesitylene?

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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