1,2,4-Trimethylbenzene
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CAS
95-63-6
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C6H3(CH3)3
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RTECS
DC3325000
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Synonyms & Trade Names
Asymmetrical trimethylbenzene, psi-Cumene, Pseudocumene [Note: hemimellitene is a mixture of the 1,2,3-isomer with up to 10% of related aromatics such as the 1,2,4-isomer.]
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DOT ID & Guide
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Exposure
Limits
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NIOSH REL: TWA 25 ppm (125 mg/m3)
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OSHA PEL†: none
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IDLH
N.D.
See: IDLH INDEX
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Conversion
1 ppm = 4.92 mg/m3
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Physical Description
Clear, colorless liquid with a distinctive, aromatic odor.
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MW: 120.2
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BP: 337°F
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FRZ: -77°F
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Sol: 0.006%
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VP(56°F): 1 mmHg
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IP: 8.27 eV
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Sp.Gr: 0.88
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Fl.P: 112°F
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UEL: 6.4%
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LEL: 0.9%
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Class II Flammable Liquid
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Incompatibilities & Reactivities
Oxidizers, nitric acid
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Measurement Methods
OSHA PV2091
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: No recommendation
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash
Breathing: Respiratory support
Swallow: Medical attention immediately
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Respirator Recommendations
Not available.
Important additional information about respirator selection
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Exposure Routes
inhalation, ingestion, skin and/or eye contact
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Symptoms
Irritation eyes, skin, nose, throat, respiratory system; bronchitis; hypochromic anemia; headache, drowsiness, fatigue, dizziness, nausea, incoordination; vomiting, confusion; chemical pneumonitis (aspiration liquid)
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Target Organs
Eyes, skin, respiratory system, central nervous system, blood
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See also: INTRODUCTION See ICSC CARD: 1433
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