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1,2,4-Trimethylbenzene

CAS Number

95-63-6

Synonym

Pseudocumene, Asymmetrical trimethylbenzene, psi-cumene, 1,2,4-TMB, trimethylbenzene

Occurrence/Use

Occurs naturally in coal tar and petroleum.  Used as a sterilizing agent and in the manufacture of dyes, perfumes, and resins.  Gasoline additive

Date Added

07/07/2015
Trimethylbenzene

Air

Acute RELs

Acute REL (μg/m3): 
2400
Species: 
Rat
Acute REL Toxicologic Endpoint: 
Visual discrimination
Acute REL Target Organs: 
Nervous system
Last Acute REL Revision: 
2023
Acute Reference Exposure Levels Comments: 

8-Hour RELs

8-Hour Inhalation REL (μg/m3): 
8
Last 8-Hour REL Revision: 
2023
8-Hour Reference Exposure Levels Comments: 

Chronic REL

Chronic Inhalation REL (μg/m3): 
4
Chronic Target Organs: 
Nervous system
Chronic Toxicologic Endpoint: 
Pain sensitivity and motor function
Last Chronic REL Revision: 
2023
Chronic Reference Exposure Levels Comments: 

Water

California Public Health Goals Data

Notification Level (μg/L): 
330
Notification Level - Download: