5-Formyl-1H-pyrazole-3-carboxylic acid CAS 854699-16-4
| CAS No. | 854699-16-4 |
| Molecular Formula | C5H4N2O3 |
| Molecular Weight | 140.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Formyl-1H-pyrazole-3-carboxylic acid (CAS 854699-16-4), molecular formula C5H4N2O3 and molecular weight 140.10 g/mol, is a CATO reference standard with documented purity and traceability.
5-Formyl-1H-pyrazole-3-carboxylic acid (C5H4N2O3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C5H4N2O3 |
| Molecular Weight | 140.10 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 2 |
Related Formyl Standards
- N-Formyl-1H-1,2,3-triazole-4-carboxamide (CAS 106913-63-7)
- 1-Formyl-1H-1,2,3-triazole-4-carboxamide (CAS 97131-36-7)
- 4-Formyl-1H-pyrazole-3-carboxylic acid (CAS 35344-94-6)
- 2-Formyl-4-furanboronic acid, 98% (CAS 62306-80-3)
- 2-formyl-1H-pyrrole-3-carboxylic acid (CAS 51361-92-3)
- 4-Formyl-1H-pyrazole-3-carboxamide (CAS 84999-41-7)
- 5-formyl-1H-pyrrole-2-carboxylic acid (CAS 7126-51-4)
- 5-Formyl-1H-pyrrole-3-carboxylic acid (CAS 946847-30-9)
Recommended Standards
- 5,5,5-Trifluoropentanal (CAS 250253-47-5)
- 5-Hydroxypyrazine-2-carboxylic acid (CAS 34604-60-9)
- 5-(Hydroxymethylene)pyrimidine-4,6(1H,5H)-dione (CAS 70450-61-2)
- 5-Hydroxypyrimidine-2-carboxylic acid (CAS 345642-87-7)
- Ethyl 5-(thiophen-2-yl)-1,2,4-oxadiazole-3-carboxylate (CAS 40019-37-2)
- 3-Amino-N-(2,6-diethylphenyl)benzamide (CAS 500274-46-4)
- Dibenzo[b,e][1,4]dioxin-2-ylmethanol (CAS 42039-85-0)
- 2-{[(2R)-4-azidobutan-2-yl]oxy}oxane (CAS 1807940-31-3)
- 2,6-Dichloro-3-(chloromethyl)pyridine hydrochloride (CAS 686780-74-5)
- 5-Bromo-N,N-dimethyl-1H,1'H-[3,4'-biindole]-1-sulfonamide (CAS 89346-37-2)
- 2-Methyl-5-(morpholinosulfonyl)aniline (CAS 21447-56-3)
- Cyclononanone (CAS 3350-30-9)
- 496-30-0 2H-Indole-2-thione, 1,3-dihydro- (9CI) 2-Indolinethione 5-21-08-00018 (Beilstein Handbook Reference) Benzazoline-2-thione BRN 0002992 1,3-Dihydro-2H-indole-2-thione (CAS 496-30-0)
- Met(O)14-Exenatide trifluoroacetate salt (CAS 1678417-38-3)
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