5-Amino-1-methylpyrazole-4-carboxylic Acid CAS 4058-91-7
| CAS No. | 4058-91-7 |
| Molecular Formula | C5H7N3O2 |
| Molecular Weight | 141.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 5-Amino-1-methylpyrazole-4-carboxylic Acid (CAS 4058-91-7), a certified reference material (molecular formula C5H7N3O2, MW 141.13 g/mol) for analytical method development and quality control.
The molecular framework of 5-Amino-1-methylpyrazole-4-carboxylic Acid (C5H7N3O2) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. 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.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C5H7N3O2 |
| Molecular Weight | 141.13 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 3 |
Related Amino Standards
- 2-(3-Amino-1H-pyrazol-1-yl)acetic acid (CAS 1006319-29-4)
- 4-Amino-1-methylpyrazole-3-carboxylic Acid (CAS 1006334-34-4)
- 2-(4-Amino-1H-pyrazol-1-yl)acetic acid (CAS 1006348-46-4)
- 5-Amino-N-methyl-1H-1,2,4-triazole-3-carboxamide (CAS 1019126-62-5)
- 4-Amino-1H-pyrazole-3-carbohydrazide (CAS 1026783-39-0)
- 1119471-86-1 methyl 4-amino-1H-pyrazole-5-carboxylate hydrochloride (CAS 1119471-86-1)
- 5-Amino-1-methyl-1H-imidazole-4-carboxylic acid (CAS 112277-40-4)
- 5-Amino-1-methyl-1H-pyrazole-3-carboxylic Acid (CAS 117860-53-4)
Recommended Standards
- 5-Amino-1-methyl-1H-1,2,3-triazole-4-carboxamide (CAS 20419-66-3)
- 5-Amino-2-methylpyrimidine-4,6-diol (CAS 98797-08-1)
- 5-Amino-1-methyl-1,2,3,4-tetrahydropyrimidine-2,4-dione (CAS 23899-79-8)
- 5-Amino-3-methylpyrimidine-2,4(1H,3H)-dione (CAS 57381-15-4)
- Naphthalen-1-yl(4-phenethylphenyl)methanone (CAS 158098-50-1)
- 1-(Boc)-5-Fluoropiperidine-3-carboxylic acid (CAS 1241725-64-3)
- 2-Amino-3-(trifluoromethyl)pyridine-4-acetonitrile (CAS 1228898-08-5)
- Nilotinib-d6 (CAS 1268356-17-7)
- 3-Methylpentyl acetate (CAS 35897-13-3)
- 3-Chloro-5-(trifluoromethyl)picolinohydrazide (CAS 1033463-30-7)
- 6-(Cyclopropylamino)-5-methylnicotinic acid (CAS 1355220-04-0)
- N-Hydroxy-6-(trifluoromethyl)picolinimidamide (CAS 1923811-65-7)
- 1-(4-Methylpiperazin-1-yl)acetone (CAS 15885-04-8)
- Endo-38a-Pro-Exenatide trifluoroacetate salt (CAS 1678416-95-9)
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