ChemicalBook > CAS DataBase List > 2-Methyl-1,4-benzenedicarboxylic acid

2-Methyl-1,4-benzenedicarboxylic acid

Application

Product Name: 2-Methyl-1,4-benzenedicarboxylic acid
CAS No.: 5156-01-4
Chemical Name: 2-Methyl-1,4-benzenedicarboxylic acid
Synonyms: DK7272;0/4/56;Nsc20693;Fluralaner-025;Fluralaner Impurity 46;Methylterephthalic acid;5-Methylterephthalic acid;2-Methylterephthalic 2-methylterephthalic acid;Terephthalic acid, methyl-
CBNumber: CB31456175
Molecular Formula: C9H8O4
Formula Weight: 180.16
MOL File: 5156-01-4.mol

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2-Methyl-1,4-benzenedicarboxylic acid Property

Melting point:: 323-325 °C
Boiling point:: 388.2±30.0 °C(Predicted)
Density: 1.377
Flash point:: 202.8℃
storage temp.: Sealed in dry,Room Temperature
pka: 3.38±0.25(Predicted)
Appearance: Off-white to yellow Solid
InChI: InChI=1S/C9H8O4/c1-5-4-6(8(10)11)2-3-7(5)9(12)13/h2-4H,1H3,(H,10,11)(H,12,13)
InChIKey: UFMBOFGKHIXOTA-UHFFFAOYSA-N
SMILES: C1(C(O)=O)=CC=C(C(O)=O)C=C1C

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Safety

HS Code: 29173990

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P280Wear protective gloves/protective clothing/eye protection/face protection.

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: SIK2103-10
Product name: 2-Methylterephthalicacid-H2MT/H2BDC-Me
Purity: ≥97%
Packaging: 1G
Price: $558
Updated: 2025/07/31

Sigma-Aldrich

Product number: SIK2103-10
Product name: 2-Methylterephthalicacid-H2MT/H2BDC-Me
Purity: ≥97%
Packaging: 250MG
Price: $174
Updated: 2023/06/20

TCI Chemical

Product number: M3640
Product name: 2-Methylterephthalic Acid
Purity: min. 95.0 %
Packaging: 1G
Price: $144
Updated: 2025/07/31

AK Scientific

Product number: J54674
Product name: 2-Methylterephthalicacid
Packaging: 1g
Price: $90
Updated: 2021/12/16

SynQuest Laboratories

Product number: 2721-1-0X
Product name: 2-Methylterephthalic acid
Purity: 98%
Packaging: 250mg
Price: $180
Updated: 2021/12/16

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2-Methyl-1,4-benzenedicarboxylic acid Chemical Properties,Usage,Production

Application

2-Methyl-1,4-phthalic acid can be used as an intermediate in pharmaceutical and chemical synthesis, such as in the synthesis of dimethyl 2-methyl terephthalate. Dimethyl 2-methyl terephthalate is an important compound in the synthesis of vinyl terephthalic acid-based chitosan liquid crystal polymers. Currently, most methods employ acid-catalyzed synthesis, resulting in low yields of only about 33% and significant raw material losses. Since dimethyl 2-methyl terephthalate is a necessary intermediate in the synthesis of vinyl terephthalic acid-based chitosan liquid crystal polymers, improving its yield is crucial. However, most acid-catalyzed esterification reactions suffer from low conversion rates. In this reaction, methanol serves as both a reagent and a solvent. Due to its low boiling point, a suitable dehydrating agent cannot be found for use in oil-water separators. Therefore, based on existing research, anhydrous copper sulfate powder, which has strong hygroscopic properties, is added. At 80°C, anhydrous copper sulfate can bind three water molecules, thereby improving the esterification conversion rate. The results of infrared IR and nuclear magnetic resonance (NMR) analyses of the obtained products confirm the correctness of the synthesized compound, laying the foundation for the next step of large-scale synthesis of vinyl terephthalic acid-based chitosan-type liquid crystal polymers.

2-Methyl-1,4-benzenedicarboxylic acid Preparation Products And Raw materials

Raw materials

Preparation Products

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View Lastest Price from 2-Methyl-1,4-benzenedicarboxylic acid manufacturers

ZHENGZHOU JIUYI TIME NEW MATERIALS CO,.LTD

Product: 2-Methyl-1,4-benzenedicarboxylic acid 5156-01-4
Price: US $1.60-6.60/kg
Min. Order: 1kg
Purity: 99%
Supply Ability: 100kg
Release date: 2025-06-19

Shaanxi Dideu Medichem Co. Ltd

Product: 2-Methyl-1,4-benzenedicarboxylic acid 5156-01-4
Price: US $0.10/KG
Min. Order: 1KG
Purity: 99.0%
Supply Ability: 1000 tons
Release date: 2020-04-24

Longyan Tianhua Biological Technology Co., Ltd

Product: 2-Methyl-1,4-benzenedicarboxylic acid 5156-01-4
Price: US $30.00/Kg/Bag
Min. Order: 25Kg/Bag
Purity: 99%
Supply Ability: 20 Tons
Release date: 2020-11-13

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