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1H-pyrazole-3,5-dicarboxylic acid

1H-pyrazole-3,5-dicarboxylic acid · also: 3,5-Dicarboxypyrazole · 3,5-Pyrazoledicarboxylic acid · 3,5-Pyrazole dicarboxylic acid · Pyrazole-3,5-dicarboxylic acid · 3,5-pyrazole-dicarboxylic acid · N,N-Dibenzyl-p-phenylenediamine

FormulaC5H4N2O4
Mol. weight156.097
PubChem CID76559
InChIKeyYDMVPJZBYSWOOP-UHFFFAOYSA-N
SMILESC1=C(NN=C1C(=O)O)C(=O)O
1,692Patents
30Research papers
210Patents - last 3 years
0Papers - last 3 years

Who owns the IP

The organizations most actively patenting around this compound, ranked by referenced patent volume.

#AssigneePatents
1BASF SE518
2Theravance Biopharma Inc51
3University of California34
4Celanese Corp29
5LG Chem Ltd25
6Zeon Corp21
7Sanofi SA20
8Centre National de la Recherche Scientifique19
9Novartis AG18
10Wacker Chemie AG18

Explore the full landscape

This preview shows the leading assignees. Cypris reveals the full ownership landscape - every filing entity, filing trends, and portfolio momentum.

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Where innovation is concentrated

Patent classifications ranked by volume reveal the technical domains with the most active filing.

#CodeAreaPatents
1B01D475
2Y02EClimate change mitigation: energy446
3B01JChemical/physical processes (e.g. catalysts)401
4H01MBatteries and accumulators373
5C08GPolymers from non-vinyl bonds (e.g. polyamides, polyesters)363
6Y02PClimate change mitigation: production352
7C07DHeterocyclic compounds344
8A61PTherapeutic activity (drug indications)307
9C08JWorking-up of plastics269
10A61KMedicinal preparations244

AI mapped opportunity space

This preview shows where patent activity concentrates. Cypris maps the full classification landscape to surface technical whitespace and IP headroom.

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Representative patents

The filings that best characterise the patent activity around this compound, most-referenced first.

TitleYearAssigneeCited by
The Sm MOF materials and preparation method constructed using 3,5 pyrazoles dicarboxylic acids as part20186
A kind of Nd MOF materials constructed using 3,5 pyrazoles dicarboxylic acids as part and preparation method20185

Who's driving the science

The most-published authors working with this compound, alongside their primary affiliations.

#AuthorAffiliationPapers
1A.M. BeattyUniversity of Missouri–St. Louis3
2Onome UgonoUniversity of Missouri–St. Louis2
3Annie K. PowellKarlsruhe Institute of Technology2
4Rodolphe CléracCentre de recherche Paul Pascal2
5Christopher E. AnsonKarlsruhe Institute of Technology2
6Shao-Ai LiGuangdong Province Environmental Monitoring Center2
7Xiao‐Ying HuangRutgers, The State University of New Jersey2
8Philippa KingKarlsruhe Institute of Technology2
9Xin‐Hui ZhouNanjing University of Posts and Telecommunications2
10Ying‐Zhong ShenNanjing University of Aeronautics and Astronautics2

Research leaders

This preview lists the top authors. Cypris surfaces the full researcher landscape, their affiliations, and how scientific influence is shifting.

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The literature that defines it

The most-cited papers anchoring the scientific record for this compound.

Frequently asked questions

Common questions about this compound's patent and research landscape, answered from the underlying data.

What is the molecular formula and weight of 1H-pyrazole-3,5-dicarboxylic acid?

1H-pyrazole-3,5-dicarboxylic acid has the molecular formula C5H4N2O4 and a molecular weight of 156.097 g/mol.

Which organizations hold the most patents involving this compound?

BASF SE holds the most patents with 518 filings, followed by Theravance Biopharma Inc with 51 patents, and University of California with 34 patents.

What are the primary technological fields associated with patents using this compound?

Patents involving this compound are primarily classified in separation and purification (B01D with 475 patents), environmental technologies (Y02E with 446 patents), chemical reactor engineering (B01J with 401 patents), and battery technology (H01M with 373 patents).

How has patent filing activity for this compound trended in recent years?

Patent filing activity has shown growth, with 63 patents in 2021 and 2022, increasing to 99 in 2023 and 103 in 2024. In 2025, there were 57 filings recorded to date.

What research topics are associated with published papers on this compound?

The 30 papers in the database focus on metal-organic frameworks, with key topics including synthesis and applications of lanthanide complexes, pH effects on coordination polymer dimensionality, and the building block approach to extended coordination solids using 3,5-pyrazoledicarboxylate ligands.

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