4-Chloro-1h-pyrazole-3-carbohydrazide CAS 1005584-54-2
| CAS No. | 1005584-54-2 |
| Molecular Formula | C4H5ClN4O |
| Molecular Weight | 160.56 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
4-Chloro-1h-pyrazole-3-carbohydrazide (CAS 1005584-54-2) is a high-purity analytical reference standard with the molecular formula C4H5ClN4O and a molecular weight of 160.56 g/mol.
4-Chloro-1h-pyrazole-3-carbohydrazide (C4H5ClN4O) contains an amide group, a hydroxyl group, an ether linkage, chlorine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
As a certified reference material (CRM), 4-Chloro-1h-pyrazole-3-carbohydrazide 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 | C4H5ClN4O |
| 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 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 |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1988 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
Related Chloro Standards
- 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)
- 3-Chloro-N-methyl-1H-1,2,4-triazole-5-carboxamide (CAS 1232800-16-6)
Recommended Standards
- 4,4,4-TRifluorobutanoyl chloride (CAS 406-91-7)
- 1-Chloro-4,4,4-trifluorobutan-2-one (CAS 55932-04-2)
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- 1-Bromo-3-chloropropane-<SUP>13</SUP>C<SUB>3</SUB> (CAS 1173023-11-4)
- 1,2,4,5,7,8-Hexachloronaphthalene (CAS 103426-92-2)
- 5-Hydroxy-5-(trifluoromethyl)-4,5-dihydro-1h-pyrazole-1-carbothioamide (CAS 219986-56-8)
- Propanil (CAS 709-98-8)
- 2-Acetyl-5-aminoisonicotinaldehyde (CAS 1393540-20-9)
- n-(2-Bromophenyl)-2-cyanoacetamide (CAS 80277-87-8)
- N-isopropyl-4-(pyrrolidin-2-ylmethoxy)benzamide (CAS 1306738-71-5)
- 4-Ethyl-5-(1-methyl-5-(trifluoromethyl)-1h-pyrazol-3-yl)-4h-1,2,4-triazole-3-thiol (CAS 1001756-37-1)
- 1,4-Ditritylbenzene (CAS 103567-76-6)
- 5-(5-Aminopentyl)-3-imino-2,3-dihydro-1h-pyrazole-4-carbonitrile (CAS 113513-29-4)
- Semaglutide impurity 22(OtBu-Ste-γGlu(OtBu)-AEEA-AEEA-OH) (CAS 1118767-16-0)
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