2-Methyl-1,4-benzenedicarboxylic acid - ≥98% , CAS No.5156-01-4

CAS: 5156-01-4 Cat. No.: M303855 Molecular Weight: 180.16 EC Number: 805-933-4
AVAILABLE TO ORDER
GRADE & PURITY ≥98%
Synonyms
F20595 | A22236 | Methylterephthalsaure | mono-methyl terephthalic acid | 2-methylbenzene-1,4-dicarboxylic acid | FT-0739618 | 2-Methyl-1,4-benzenedicarboxylicacid | AKOS006327080 | MFCD09835103 | monomethylterephthalic acid | 2-Methylterephthalic acid, 9
Storage
Room temperature
Shipped In
Normal
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
250mg
M303855-250mg
2
$9.90
1g
M303855-1g
3
$22.90
5g
M303855-5g
1
$75.90
25g
M303855-25g
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.
$289.90
Enter a quantity for the sizes you want to add.
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Why this grade

≥98% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Room temperature Ships Normal Check lot-specific COA for exact specifications.

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Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

📚

Literature proof

Cited in 6 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
F20595 | A22236 | Methylterephthalsaure | mono-methyl terephthalic acid | 2-methylbenzene-1, 4-dicarboxylic acid | FT-0739618 | 2-Methyl-1, 4-benzenedicarboxylicacid | AKOS006327080 | MFCD09835103 | monomethylterephthalic acid | 2-Methylterephthalic acid, 9
Specifications & Purity
≥98%
Storage
Room temperature
Shipped In
Normal
Purity
≥98%
Names and Identifiers
Pubchem Sid488188786
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/488188786
Canonical SmilesCC1=C(C=CC(=C1)C(=O)O)C(=O)O
IUPAC Name2-methylterephthalic acid
InChIKeyUFMBOFGKHIXOTA-UHFFFAOYSA-N
INCHI1S/C9H8O4/c1-5-4-6(8(10)11)2-3-7(5)9(12)13/h2-4H,1H3,(H,10,11)(H,12,13)
Isomeric SMILES CC1=C(C=CC(=C1)C(=O)O)C(=O)O
Molecular Weight 180.16
Reaxy-Rn 1953686
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=1953686&ln=

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

View datasheet →

🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassBenzenoids
ClassBenzene and substituted derivatives
SubclassBenzoic acids and derivatives
Intermediate Tree Nodes Phthalic acid and derivatives
Direct ParentP-phthalic acid and derivatives
Alternative Parents Benzoic acids  Benzoyl derivatives  Toluenes  Dicarboxylic acids and derivatives  Carboxylic acids  Organooxygen compounds  Organic oxides  Hydrocarbon derivatives  
Molecular FrameworkAromatic homomonocyclic compounds
Substituents Para_phthalic_acid - Benzoic acid - Benzoyl - Toluene - Dicarboxylic acid or derivatives - Carboxylic acid - Carboxylic acid derivative - Organic oxygen compound - Organic oxide - Hydrocarbon derivative - Organooxygen compound - Aromatic homomonocyclic compound
DescriptionThis compound belongs to the class of organic compounds known as p-phthalic acid and derivatives. These are compounds containing a benzene ring bearing a carboxylic acid group at ring carbon atoms 1 and 4.
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

20 results found

Lot NumberCertificate TypeDateItem
C2631308Certificate of AnalysisMar 17, 2026 M303855
C2631309Certificate of AnalysisMar 17, 2026 M303855
C2631341Certificate of AnalysisMar 17, 2026 M303855
B2303465Certificate of AnalysisOct 30, 2025 M303855
B2303486Certificate of AnalysisOct 30, 2025 M303855
B2303488Certificate of AnalysisOct 30, 2025 M303855
B2303489Certificate of AnalysisOct 30, 2025 M303855
B2303492Certificate of AnalysisOct 30, 2025 M303855
D2525064Certificate of AnalysisApr 30, 2025 M303855
F2218055Certificate of AnalysisApr 08, 2025 M303855
E2210093Certificate of AnalysisMar 10, 2025 M303855
G2117345Certificate of AnalysisMay 16, 2024 M303855
D2518087Certificate of AnalysisDec 09, 2022 M303855
D2521654Certificate of AnalysisDec 09, 2022 M303855
B2303491Certificate of AnalysisDec 09, 2022 M303855
B2303490Certificate of AnalysisDec 09, 2022 M303855
B2303467Certificate of AnalysisDec 09, 2022 M303855
D2425056Certificate of AnalysisFeb 19, 2022 M303855
E2210050Certificate of AnalysisFeb 19, 2022 M303855
E2210092Certificate of AnalysisFeb 19, 2022 M303855

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Chemical and Physical Properties
Refractive Index1.611
Flash Point(°C)202.8ºC
Boil Point(°C)388.2ºC
Melt Point(°C)324℃
Molecular Weight180.160 g/mol
XLogP31.300
Hydrogen Bond Donor Count2
Hydrogen Bond Acceptor Count4
Rotatable Bond Count2
Exact Mass180.042 Da
Monoisotopic Mass180.042 Da
Topological Polar Surface Area74.600 Ų
Heavy Atom Count13
Formal Charge0
Complexity224.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
Citations of This Product
References
1. Xinzhao Jiang, Wei Wang, Jincheng Tang, Meng Han, Yichang Xu, Lichen Zhang, Jie Wu, Yiyang Huang, Zhouye Ding, Huiwen Sun, Kun Xi, Yong Gu, Liang Chen.  (2023)  Ligand-Screened Cerium-Based MOF Microcapsules Promote Nerve Regeneration via Mitochondrial Energy Supply.  Advanced Science,      [PMID:38037294] [10.1002/advs.202306780]
2. Qiufan Sun, Yuxiang Zhu, Xiang Zhong, Meng Jiang, Yanchen Fan, Jianfeng Yao.  (2022)  Tuning Photoactive MIL-68(In) by Functionalized Ligands for Boosting Visible-Light Nitrogen Fixation.  ACS Applied Materials & Interfaces,      [PMID:36416066] [10.1021/acsami.2c17007]
3. Guoxiang Yang, Longyang Wang, Chencheng Zhang, Ping Li, Hao Du, Yanjie Mao, Mengyi Qiu, Qiang Li, Derek Hao, Qi Wang.  (2023)  Novel graphene quantum dots modified NH2-MIL-125 photocatalytic composites for effective antibacterial property and mechanism insight.  SEPARATION AND PURIFICATION TECHNOLOGY,      [PMID:] [10.1016/j.seppur.2023.123433]
4. Sheng Fan, Xinru Lu, Haoliang Li, Xiaodong Du, Xiaoyu Huang, Yao Ma, Juan Wang, Xueqin Tao, Zhi Dang, Guining Lu.  (2022)  Efficient removal of organophosphate esters by ligand functionalized MIL-101 (Fe): Modulated adsorption and DFT calculations.  CHEMOSPHERE,      [PMID:35561783] [10.1016/j.chemosphere.2022.134881]
5. Jiao-Jiao Cao, Jin-Long Ge, Yan Gao, Bo-Kai Liao.  (2025)  Impact of amino and methyl groups on the loading capacity of UiO-66 for 8-hydroxyquinoline: an in-depth experimental and computational analysis.  RSC Advances,  15  (26): (20570-20588).  [PMID:40530311] [10.1039/D5RA02802G]
6. Wen Li, Kaiming Ge, Ji-Na Hao, Yongsheng Li.  (2025)  Ordered-Pore-Structure Engineering of Dual-Emissive Lanthanide-Based Metal–Organic Frameworks for Boosting Sensing Performance of Tumor Marker.  ANALYTICAL CHEMISTRY,      [PMID:41261802] [10.1021/acs.analchem.5c02857]
Solution Calculators
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