Product

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Main Product
C9 Aromatics (Saturated)
Segment
Chemicals
Main-Family
Aromatics
Sub-Family
C9 Aromatics
Physical State

Liquid

Product
Trimethylbenzene (Isomers)
Abbreviation
TMB
Names
Hemimellitene; Pseudocumene; Mesitylene; Symmetrical TMB

Description

Trimethylbenzenes (TMBs) are aromatic hydrocarbons consisting of a benzene ring with three methyl groups, forming three structural isomers:

     6. 1,2,3-Trimethylbenzene (hemimellitene)
7. 1,2,4-Trimethylbenzene (pseudocumene)
8. 1,3,5-Trimethylbenzene (mesitylene)

 

TMBs are produced during catalytic reforming of petroleum naphtha, appearing in the reformate along with other aromatics. The reforming process transforms paraffins and naphthenes into aromatics-rich products. TMBs are also present in steam cracking products, specifically in pyrolysis gasoline (py-gas) and in C9+ streams containing monoaromatics.

In naphtha reformate, pseudocumene (1,2,4-TMB) can be readily recovered by conventional distillation. In steam cracking of naphtha, aromatics (including TMBs) typically make up 1-10 wt% of the products, mainly as BTX. Commercial C9 aromatic naphtha typically contains 1,2,4-trimethylbenzene at 20-45%, 1,3,5-trimethylbenzene at 8-15%.

 

Source: Perplexity A.I. search, 3rd Jan 2024, Various prompts related to 'Trimethylbenzene'.

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Products Picture
Benzene ring isomers of molecular formula C9H12; 1,2,3-, 1,2,4- and 1,3,5-TMB numbered respectively 6, 7 and 8. https://docbrown.info/page06/isomers/isom-c9h12.htm
  Product Communicator
Title Date
  UserPic Trimethylbenzene added. 1/4/2025
Identifiers

No Identifiers defined

Chemical Data
Chemical Formula

C9H12

Molecular Weight (g/mol)
120.19
Boiling Point (°C)
170
Specific Gravity
0.87
Crude Data
API Gravity
30.4
Country
Product Settings
Default
Status
A
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Transaction Name Date
Modified by UserPic   Kokel, Nicolas 1/4/2025 8:30 AM
Added by UserPic   Kokel, Nicolas 1/3/2025 9:40 PM