Pyrazole-1-carboxamidine monohydrochloride
CAS 4023-02-3 · C₄H₆N₄·HCl · MW 146.58 g/mol
About Pyrazole-1-carboxamidine monohydrochloride
Pyrazole-1-carboxamidine monohydrochloride is a chemical compound registered under number CAS 4023-02-3, with the molecular formula C₄H₆N₄·HCl, and a molar mass of 146.58 g/mol.
The molecule contains 16 atoms connected by 15 chemical bonds. The full systematic IUPAC name of this compound is pyrazole-1-carboximidamide;hydrochloride. The interactive 3D model above lets you view the spatial arrangement of the atoms — you can rotate it with the mouse, zoom with the scroll wheel, and switch between skeletal / Ball & Stick / Space Fill visualization modes.
In terms of physicochemical properties, polar surface area PSA = 67.7 Ų, 3 donors and 2 hydrogen bond acceptors. These parameters are key when assessing bioavailability and interaction with biomolecules.
Chemical data for this compound comes from PubChem (NIH NLM NCBI), one of the world's largest chemical databases. All information is updated automatically and enriched with GHS hazard statement translations compliant with the CLP Regulation (EC 1272/2008). The widget above may be used for educational, research and commercial purposes.
Physicochemical properties
| Molecular formula | C₄H₆N₄·HCl |
| Molar mass | 146.58 g/mol |
| IUPAC | pyrazole-1-carboximidamide;hydrochloride |
| SMILES | C1=CN(N=C1)C(=N)N.Cl |
| InChIKey | RBZRMBCLZMEYEH-UHFFFAOYSA-N |
| logP (XLogP3) | — |
| PSA | 67.7 Ų |
| HBD / HBA | 3 / 2 |
| PubChem CID | CID 2734672 ↗ |
GHS safety
Signal word: Danger
H302 — Harmful if swallowed
H373 — May cause damage to organs through prolonged or repeated exposure
H318 — Causes serious eye damage
H317 — May cause an allergic skin reaction
H412 — Harmful to aquatic life with long lasting effects
Scientific literature
Brak articles naukowych dla CAS 4023-02-3 w PubMed / OpenAlex / Semantic Scholar.
Synonyms
Data sources
- 📊 PubChem CID 2734672 — NIH
- 🔬 NIST WebBook — spectroscopy
- 🌐 Wikidata
- 💊 ChEMBL — bioactivity
Related molecules
📜 License & provenancePREDICTED MODEL · NOT VERIFIEDMolGod_License_1
computed by MolGod Scientific · experimental feature (beta) · may contain errors
ILLUSTRATIVE FRAGMENT ARRANGEMENT — relative positions are not structural data
No source 3-D conformer was available to MolGod for this substance. MolGod Scientific computed this geometry from the structural formula with RDKit 2026.03.6 (ETKDGv3 conformer generation, MMFF94+UFF force-field optimisation; lowest-energy converged conformer of a fixed-seed set). It is not a measured structure, it does not come from PubChem, and it has not been compared with experimental data. It shows one possible conformation.
This substance consists of 2 separate components (for example ions). Each component was computed separately; they are arranged radially around a layout anchor for visualisation only (at least 3.0 Å apart). Their relative positions are not a crystal structure, coordination geometry, ionic contacts or any experimentally determined arrangement.
1 stereo element(s) undefined in the source record (0 stereocentre(s), 1 double-bond E/Z) were assigned arbitrarily; the model shows one stereoisomer only, which may not be the naturally occurring or commercial form.
Methods and references
- RDKit: Open-source cheminformatics, version 2026.03.6. Zenodo. doi:10.5281/zenodo.22140358 (all versions: doi:10.5281/zenodo.591637)
- Riniker S, Landrum GA. Better Informed Distance Geometry: Using What We Know To Improve Conformation Generation. J. Chem. Inf. Model. 2015, 55, 2562-2574. doi:10.1021/acs.jcim.5b00654
- Wang S, Witek J, Landrum GA, Riniker S. Improving Conformer Generation for Small Rings and Macrocycles Based on Distance Geometry and Experimental Torsional-Angle Preferences. J. Chem. Inf. Model. 2020, 60, 2044-2058. doi:10.1021/acs.jcim.0c00025
- Halgren TA. Merck molecular force field. I. Basis, form, scope, parameterization, and performance of MMFF94. J. Comput. Chem. 1996, 17, 490-519. doi:10.1002/(SICI)1096-987X(199604)17:5/6<490::AID-JCC1>3.0.CO;2-P
- Tosco P, Stiefl N, Landrum G. Bringing the MMFF force field to the RDKit: implementation and validation. J. Cheminform. 2014, 6, 37. doi:10.1186/s13321-014-0037-3
- Rappe AK, Casewit CJ, Colwell KS, Goddard WA III, Skiff WM. UFF, a full periodic table force field for molecular mechanics and molecular dynamics simulations. J. Am. Chem. Soc. 1992, 114, 10024-10035. doi:10.1021/ja00051a040
- Heller SR, McNaught A, Pletnev I, Stein S, Tchekhovskoi D. InChI, the IUPAC International Chemical Identifier. J. Cheminform. 2015, 7, 23. doi:10.1186/s13321-015-0068-4
- Kim S, Chen J, Cheng T, et al. PubChem 2025 update. Nucleic Acids Res. 2025, 53, D1516-D1525. doi:10.1093/nar/gkae1059 Compound record: https://pubchem.ncbi.nlm.nih.gov/compound/2734672
- Bolton EE, Kim S, Bryant SH. PubChem3D: Conformer generation. J. Cheminform. 2011, 3, 4. doi:10.1186/1758-2946-3-4 (cited for contrast: no source 3-D conformer was available to MolGod for this record)
MG-STL-4023-02-3-ENGRAVED · 201,384 △ · 10 MB · SHA-256 8c3c74f397aa5781
MG-STL-4023-02-3-NORMAL · 6,848 △ · 334 KB · SHA-256 217867791ab1e9ec
- Model
- Pyrazole-1-carboxamidine monohydrochloride ·
4023-02-3 - InChIKey
- RBZRMBCLZMEYEH-UHFFFAOYSA-N
- License
- CC BY-SA 4.0 International (source rights undetermined — not yet granted)
- Attribution
- MolGod Scientific — Pyrazole-1-carboxamidine monohydrochloride (CAS 4023-02-3)
- License & provenance record
- Pyrazole-1-carboxamidine monohydrochloride (CAS 4023-02-3) →
- MolGod molecule record
- Pyrazole-1-carboxamidine monohydrochloride →
- Source data
- PubChem CID 2734672 ↗
- Model information
- STL generated by MolGod ·
MolGod STL Exporter build 48804cd20b0d· generated 2026-10-14 - SHA-256 (STL)
- 217867791ab1e9eca48d3b466765217bd073d38577d02b1e20bf06752453523a
- MD5 (STL)
- 21522dd8a2c6effc8197d620ccd30752
- Model identifier
- MG-STL-4023-02-3
- Transformation
- MolGod Scientific ball-and-stick mesh
- Changes
- PREDICTED geometry computed by MolGod Scientific (RDKit), NOT verified; rendered as a triangulated mesh.
- Wikimedia Commons
- not published yet
This license applies to the MolGod-created STL mesh, not automatically to third-party source material.