Determine the necessary mass, volume, or concentration for preparing a solution.
≥95% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.
Room temperature,Argon charged Ships Normal Check lot-specific COA for exact specifications.
SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.
Cited in 5 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.
| Canonical Smiles | C1=C(NN=C1C(=O)O)C(=O)O |
|---|---|
| IUPAC Name | 1H-pyrazole-3,5-dicarboxylic acid |
| InChIKey | YDMVPJZBYSWOOP-UHFFFAOYSA-N |
| INCHI | 1S/C5H4N2O4/c8-4(9)2-1-3(5(10)11)7-6-2/h1H,(H,6,7)(H,8,9)(H,10,11) |
| Isomeric SMILES | C1=C(NN=C1C(=O)O)C(=O)O |
| Alternate CAS | 303180-11-2 |
| Molecular Weight | 156.10 |
| Beilstein | 25162 |
| Reaxy-Rn | 147821 |
Comprehensive hazard, handling, storage, and regulatory compliance document.
Download SDS →Lot-specific quality data. Enter your lot number to retrieve the exact COA.
Look up COA →Full quality attributes and acceptance criteria for this grade.
View spec sheet →Taxonomy Tree
| Kingdom | Organic compounds |
|---|---|
| Superclass | Organoheterocyclic compounds |
| Class | Azoles |
| Subclass | Pyrazoles |
| Intermediate Tree Nodes | Not available |
| Direct Parent | Pyrazole carboxylic acids and derivatives |
| Alternative Parents | Dicarboxylic acids and derivatives Heteroaromatic compounds Carboxylic acids Azacyclic compounds Organopnictogen compounds Organooxygen compounds Organonitrogen compounds Organic oxides Hydrocarbon derivatives |
| Molecular Framework | Aromatic heteromonocyclic compounds |
| Substituents | Pyrazole-3-carboxylic acid or derivatives - Pyrazole-5-carboxylic acid or derivatives - Dicarboxylic acid or derivatives - Heteroaromatic compound - Azacycle - Carboxylic acid - Carboxylic acid derivative - Organic nitrogen compound - Organic oxygen compound - Organopnictogen compound - Organic oxide - Hydrocarbon derivative - Organooxygen compound - Organonitrogen compound - Aromatic heteromonocyclic compound |
| Description | This compound belongs to the class of organic compounds known as pyrazole carboxylic acids and derivatives. These are heterocyclic compounds containing a pyrazole ring in which a hydrogen atom is replaced by a carboxylic acid group. |
| External Descriptors | Not available |
Find and download the COA for your product by matching the lot number on the packaging.
| Lot Number | Certificate Type | Date | Item |
|---|---|---|---|
| Certificate of Analysis | Jan 28, 2026 | P1505168 | |
| Certificate of Analysis | Jan 26, 2026 | P1505168 | |
| Certificate of Analysis | Jan 26, 2026 | P1505168 | |
| Certificate of Analysis | Jan 24, 2026 | P1505168 |
| Sensitivity | air sensitive |
|---|---|
| Melt Point(°C) | 287 °C |
| Molecular Weight | 156.100 g/mol |
| XLogP3 | -0.100 |
| Hydrogen Bond Donor Count | 3 |
| Hydrogen Bond Acceptor Count | 5 |
| Rotatable Bond Count | 2 |
| Exact Mass | 156.017 Da |
| Monoisotopic Mass | 156.017 Da |
| Topological Polar Surface Area | 103.000 Ų |
| Heavy Atom Count | 11 |
| Formal Charge | 0 |
| Complexity | 193.000 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| The total count of all stereochemical bonds | 0 |
| Covalently-Bonded Unit Count | 1 |
| 1. Bingquan Chen, Xiao-Wen Gu, Liyun Zhong, Enyu Wu, Bin Li. (2025) Chelation of silver ions into a chemically stable and scalable aluminum-based metal−organic framework for highly efficient and recyclable sterilization. JOURNAL OF MOLECULAR STRUCTURE, [PMID:] [10.1016/j.molstruc.2025.143842] |
| 2. Jiadong Zhu, Jianbo Hu, Hao Xiao, Lifeng Yang, Mingshan Yang, Shucheng Wang, Jianjun Zhang, Huabin Xing. (2023) Aluminum-based metal organic frameworks for greenhouse gases CF4 and C2F6 capture with excellent capacity and selectivity. SEPARATION AND PURIFICATION TECHNOLOGY, [PMID:] [10.1016/j.seppur.2023.125614] |
| 3. Ke Wu, Lulu Guo, Wei Wang, Zhimin Yang, Haishun Liu. (2024) Cu(II) coordination MOF-303 based dual-functional sensor for precisely detecting and distinguishing humidity and temperature with multifunction applications. SENSORS AND ACTUATORS B-CHEMICAL, [PMID:] [10.1016/j.snb.2024.136174] |
| 4. Jianwei Yuan, Chengcheng Zhou, Jiawei Zheng, Qianqian Jia, Zhenggang Wang, Haipeng Zhu, Guozhen Liu, Yanan Guo, Zhenwei Zhang, Shuping Zhang, Pin Zhou, Gongping Liu, Wanqin Jin. (2024) Novel MOF-303 integrated polymer membrane for efficient separation of azeotropic methanol-MTBE mixtures. SEPARATION AND PURIFICATION TECHNOLOGY, [PMID:] [10.1016/j.seppur.2024.126623] |
| 5. Yiqiang Deng, Shengwang Li, Zhuo Yang, Guining Chen, Xiuling Chen, Shuang-Feng Yin, Gongping Liu. (2025) Small molecule bridged MOF-802/polymer mixed-matrix membranes for helium extraction. JOURNAL OF MEMBRANE SCIENCE, [PMID:] [10.1016/j.memsci.2025.125075] |