4,5-Dihydro-1H-pyrazole-5-carbonitrile CAS 63438-31-3
| CAS No. | 63438-31-3 |
| Molecular Formula | C4H5N3 |
| Molecular Weight | 95.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 4,5-Dihydro-1H-pyrazole-5-carbonitrile (C4H5N3) is characterized by a nitrile group. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
4,5-Dihydro-1H-pyrazole-5-carbonitrile (CAS 63438-31-3), molecular formula C4H5N3 and molecular weight 95.10 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C4H5N3 |
| Molecular Weight | 95.10 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1975 |
| Nitrogen Atoms | 3 |
Related Dihydro Standards
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- 1-Methyl-1,3-dihydro-2H-pyrrol-2-one (CAS 22124-67-0)
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- 5,6-Dihydro-1H-pyridin-2-one (CAS 6052-73-9)
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- 5-methyl-3,4-dihydro-2H-pyran (CAS 15990-73-5)
Recommended Standards
- 3-Oxocyclobutanecarbonitrile (CAS 20249-16-5)
- 4-Methyl-1,2,3-triazine (CAS 77202-08-5)
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- 5-Methyl-2H-pyrrol-2-one (CAS 922179-95-1)
- (6-Bromo-5-(chloromethyl)-3-(difluoromethyl)pyridin-2-yl)methanol (CAS 1806915-65-0)
- Cyclohexyl(imino)(methyl)-lambda6-sulfanone (CAS 1085526-16-4)
- 7-(Piperidin-1-yl)benzo[c][1,2,5]oxadiazol-4-amine (CAS 842964-23-2)
- tert-Butyl (2-(thiophen-3-yl)phenyl)carbamate (CAS 886505-35-7)
- Pentyl 4-(2-bromophenyl)-6-methyl-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate (CAS 300799-35-3)
- Methyl 2-isopropylpyrrolidine-1-carboxylate (CAS 342878-54-0)
- 5-(4-Aminophenyl)-5-methyl-2-phenyl-1,2,4-triazolidin-3-one (CAS 245039-30-9)
- n-(1-(P-tolyl)propyl)propionamide (CAS 894632-62-3)
- 2-chloro-n-[(2e)-1-(2-methylprop-1-en-1-yl)pyrrolidin-2-ylidene]aniline 4282-24-0 AR-1E0663 (CAS 4282-24-0)
- Liraglutide (14-31)TFA Salt (CAS CATO-C4X-19927)
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