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611-01-8 Usage


2,4-Dimethylbenzoic acid, also known as isophthalic acid, is an organic compound belonging to the family of aromatic carboxylic acids. It is characterized by the presence of two methyl groups attached to the 2nd and 4th carbon atoms of a benzene ring, with a carboxylic acid functional group. 2,4-Dimethylbenzoic acid exhibits acidic properties and is soluble in organic solvents.


Used in Analytical Chemistry:
2,4-Dimethylbenzoic acid is used as a buffer agent for capillary electrophoretic separation of α-, β-, γ-cyclodextrins. It plays a crucial role in maintaining the pH and ionic strength of the separation medium, ensuring efficient and accurate separation of these complex carbohydrates. This application is particularly important in pharmaceutical, food, and cosmetic industries, where cyclodextrins are widely used for their encapsulation and solubility-enhancing properties.

Purification Methods

Crystallise the acid from EtOH or H2O, and sublime it in a vacuum. [Beilstein 9 H 531, 9 III 2436, 9 IV 1801.]

Check Digit Verification of cas no

The CAS Registry Mumber 611-01-8 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,1 and 1 respectively; the second part has 2 digits, 0 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 611-01:
38 % 10 = 8
So 611-01-8 is a valid CAS Registry Number.

611-01-8 Well-known Company Product Price

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  • Alfa Aesar

  • (A10589)  2,4-Dimethylbenzoic acid, 98%   

  • 611-01-8

  • 10g

  • 485.0CNY

  • Detail
  • Alfa Aesar

  • (A10589)  2,4-Dimethylbenzoic acid, 98%   

  • 611-01-8

  • 50g

  • 1822.0CNY

  • Detail



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 12, 2017

Revision Date: Aug 12, 2017


1.1 GHS Product identifier

Product name 2,4-dimethylbenzoic acid

1.2 Other means of identification

Product number -
Other names m-Xylylsaeure

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:611-01-8 SDS

611-01-8Relevant articles and documents

Conformation of hydrogen-bonded dimeric o-methyl-substituted benzoic acids

Glinski, Marek,Wilczkowska, Ewa,Madura, Izabela D.,Zachara, Janusz

, (2008)

Molecules of 2,4-dimethyl-benzoic acid, C9H10O2, form typical centrosymmetric hydrogen-bonded dimers. The carboxyl group is twisted with respect to the benzene ring and the methyl group in the ortho position shows evasive in-plane splaying. The relation b


, p. 4098,4102, 4105 (1930)

Carboxylation of sodium arylsulfinates with CO2over mesoporous K-Cu-20TiO2

Chen, Lei,Chen, Yanjiao,Dai, Xuan,Peng, Xinhua,Wu, Tao,Zhang, Wenwei

, p. 772 - 776 (2022/01/22)

A mesoporous ternary metal oxide (K-Cu-20TiO2) from a simple sol-gel method was prepared to catalyze heterogeneously the carboxylation reaction of various sodium arylsulfinates under atmospheric carbon dioxide. The catalyst showed excellent selectivity and good functional group tolerance to carboxylation recycle. The oxidation state of active copper(i) by characterization using FTIR, XRD, TG, XPS and TEM techniques proved to be efficacious to conduct atom economical reactions.

Dehydrogenation of Alcohols to Carboxylic Acid Catalyzed by in Situ-Generated Facial Ruthenium- CPP Complex

Liu, Hui-Min,Jian, Lei,Li, Chao,Zhang, Chun-Chun,Fu, Hai-Yan,Zheng, Xue-Li,Chen, Hua,Li, Rui-Xiang

, p. 9151 - 9160 (2019/08/12)

A selective catalytic system for the dehydrogenation of primary alcohols to carboxylic acids using a facial ruthenium complex generated in situ from the [Ru(COD)Cl2]n and a hybrid N-heterocyclic carbene (NHC)-phosphine-phosphine ligand (CPP) has been first reported. The facial coordination model was unveiled by NMR analysis of the reaction mixture. Such a fac-ruthenium catalyst system exhibited high catalytic activity and stability, and a high turnover number of 20 000 could be achieved with catalyst loading as low as 0.002 mol %. The exceedingly high catalyst stability was tentatively attributed to both the anchoring role of NHC and the hemi-lability of phosphines. The catalytic system also features a wide substrate scope. In particular, the facial coordination of CPP ligands was found to be beneficial for sterically hindered alcohols, and ortho-substituted benzylic alcohols and bulky adamantanyl methanol as well as cholesterol were all found to be viable dehydrogenation substrates.

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