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1,3,5-Trimethylbenzene

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Synonyms & Trade Names
Mesitylene, Symmetrical trimethylbenzene, sym-Trimethylbenzene
CAS No.
108-67-8
RTECS No.
OX6825000
DOT ID & Guide
2325 129
Formula
C₆H₃(CH₃)₃
Conversion
1 ppm = 4.92 mg/m3
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
TWA 25 ppm (125 mg/m3)
OSHA PEL
none See Appendix G
Measurement Methods
OSHA PV2091
See: NMAM or OSHA Methods
Physical Description
Clear, colorless liquid with a distinctive, aromatic odor.
Molecular Weight
120.2
Boiling Point
329°F
Freezing Point
-49°F
Solubility
0.002%
Vapor Pressure
2 mmHg
Ionization Potential
8.39 eV
Specific Gravity
0.86
Flash Point
122°F
Upper Explosive Limit
?
Lower Explosive Limit
?
Class II Flammable Liquid
Incompatibilities & Reactivities
Oxidizers, nitric acid
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, nose, throat, respiratory system; bronchitis; hypochromic anemia; headache, drowsiness, lassitude (weakness, exhaustion), dizziness, nausea, incoordination; vomiting, confusion; chemical pneumonitis (aspiration liquid)
Target Organs
Eyes, skin, respiratory system, central nervous system, blood
Personal Protection/Sanitation
(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated
Remove:When wet or contaminated
Change:No recommendation
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Soap wash
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

Not available.

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 1155
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health