4-Chloro-1-ethyl-3-nitro-1h-pyrazole CAS 1006993-51-6
| CAS No. | 1006993-51-6 |
| Molecular Formula | C5H6ClN3O2 |
| Molecular Weight | 175.57 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 4-Chloro-1-ethyl-3-nitro-1h-pyrazole (CAS 1006993-51-6), a certified reference material (molecular formula C5H6ClN3O2, MW 175.57 g/mol) for analytical method development and quality control.
Based on its molecular formula C5H6ClN3O2, 4-Chloro-1-ethyl-3-nitro-1h-pyrazole contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 175.57 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
As a certified reference material (CRM), 4-Chloro-1-ethyl-3-nitro-1h-pyrazole 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 | C5H6ClN3O2 |
| Molecular Weight | 175.57 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.) | 1988 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Chloro Standards
- 2-(4-Chloro-3-imino-2,3-dihydro-1h-pyrazol-1-yl)acetic acid (CAS 1006340-80-2)
- Methyl 4-chloro-3-methylisoxazole-5-carboxylate (CAS 103912-55-6)
- 2-Chloro-N-(5-methyl-1,3,4-oxadiazol-2-yl)acetamide (CAS 1049873-58-6)
- 4-Chloro-1,5-dimethyl-3-nitro-1H-pyrazole (CAS 1172928-09-4)
- 2-Chloro-N-(3-methyl-1,2,4-oxadiazol-5-yl)acetamide (CAS 1181505-87-2)
- 2-(5-Chloro-3-methyl-1,2-oxazol-4-yl)acetic acid (CAS 1239758-91-8)
- 1243250-11-4 3-(3-Chloro-1H-1,2,4-triazol-5-yl)propanoic acid 3008AD C5H6ClN3O2 (CAS 1243250-11-4)
- Methyl 2-(3-chloro-1H-1,2,4-triazol-1-yl)acetate (CAS 1308384-35-1)
Recommended Standards
- 3-amino-4-chloro-1-methyl-1H-pyrazole-5-carboxylic acid (CAS 1006451-86-0)
- methyl 5-(chloromethyl)-1,2-oxazole-4-carboxylate (CAS 1027781-88-9)
- N-(4-Chlorophenyl-1,2,3,4,5,6-13C6)acetamide (CAS 1329611-30-4)
- 2-Chloro-5-fluoropyrimidine-4-carboxamide (CAS 2058321-73-4)
- Benzyl 1,2,3-thiadiazol-4-ylcarbamate (CAS 4100-28-1)
- 2-(Aminomethyl)benzoic acid (CAS 25672-97-3)
- (1-(tert-Butoxycarbonyl)-3,8-dimethyl-2,3-dihydro-1H-pyrido[2,3-b][1,4]oxazin-7-yl)boronic acid (CAS 2581868-95-1)
- (E)-3-Bromo-2-methylacrylonitrile (CAS 28976-77-4)
- N1-(Benzo[d][1,3]dioxol-5-yl)-N2-(3-hydroxypropyl)oxalamide (CAS 433252-94-9)
- 3′,5-Dihydroxy-4′,6,7-trimethoxyflavanone (CAS 90850-99-0)
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- 5,5-Dimethyl-2-propanoylcyclohexane-1,3-dione (CAS 1904-20-7)
- 5-Ethyl-1-methyl-1H-imidazole (CAS 196304-00-4)
- [a-Glu](Side chain transposition)- Semaglutide (CAS CATO-C4X-2226111)
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