4-Chloro-1-methyl-1H-pyrazole-5-carboxylic acid CAS 84547-83-1
| CAS No. | 84547-83-1 |
| Molecular Formula | C5H5ClN2O2 |
| Molecular Weight | 160.56 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 4-Chloro-1-methyl-1H-pyrazole-5-carboxylic acid.
CATO supplies 4-Chloro-1-methyl-1H-pyrazole-5-carboxylic acid (CAS 84547-83-1), a certified reference material (molecular formula C5H5ClN2O2, MW 160.56 g/mol) for analytical method development and quality control.
Structurally, 4-Chloro-1-methyl-1H-pyrazole-5-carboxylic acid (C5H5ClN2O2) contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 160.56 g/mol, it falls into the medium-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 4-Chloro-1-methyl-1H-pyrazole-5-carboxylic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C5H5ClN2O2 |
| Molecular Weight | 160.56 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1981 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chloro Standards
- 4-Chloro-1h-pyrazole-3-carbohydrazide (CAS 1005584-54-2)
- 5-Chloro-2-methyl-1H-imidazole-4-carboxylic acid (CAS 1093261-72-3)
- 5-chloro-3-methyl-1H-pyrazole-4-carboxylic acid (CAS 1093414-62-0)
- 4-Chloro-6-methoxypyridazin-3(2H)-one (CAS 113707-82-7)
- 5-Chloro-6-methoxypyridazin-3(2H)-one (CAS 113707-83-8)
- 5-Chloro-1-methyl-1H-pyrazole-3-carboxylic acid, 97% (CAS 1173246-76-8)
- Methyl 5-chloro-1H-imidazole-4-carboxylate (CAS 1192372-11-4)
- methyl 5-chloro-1H-imidazole-2-carboxylate (CAS 1211589-29-5)
Recommended Standards
- 4-Chloro-1-methyl-1H-pyrazole-3-carboxylic acid (CAS 84547-85-3)
- 4-Chloro-3-methylisoxazole-5-carboxamide (CAS 860371-74-0)
- 4,5-Diamino-6-chloropyridazin-3(2H)-one (CAS 28682-71-5)
- 4-Chloro-5-hydrazinyl-2,3-dihydropyridazin-3-one (CAS 6959-56-4)
- 2-(4-(4-(Tert-butyl)phenyl)-3-methyl-5-oxo-4,5-dihydro-1H-1,2,4-triazol-1-yl)acetonitrile (CAS 860612-55-1)
- 4,5,6,7-Tetrahydroisoxazolo[4,5-c]pyridine hydrochloride (CAS 1864051-65-9)
- 1,3-Dihydrobenzo[c]thiophene-5-carbothioamide (CAS 1256483-70-1)
- N-((2S,3R,4R,5S,6R)-2-(Benzyloxy)-4,5-dihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-3-yl)acetamide (CAS 13343-62-9)
- 4,4-Dibromo-2,4-dihydro-5-methyl-3H-pyrazol-3-one (CAS 33549-66-5)
- Methyl 2-chloro-5-ethynylnicotinate (CAS 1256794-68-9)
- 1,1-Bis(Dodecyloxy) Hexadecane (CAS 56554-64-4)
- 4-Chloro-3-(2-methylphenyl)propiophenone (CAS 898789-44-1)
- 2,6-Dichloro-3,5-dimethoxybenzaldehyde (CAS 287175-08-0)
- 30003-72-6 insulin chain b oxidized (CAS 30003-72-6)
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