Methyl 5-[(4-chlorophenyl)sulfanyl]-4-[(hydroxyimino)methyl]-1-phenyl-1H-pyrazole-3-carboxylate CAS 318237-99-9
| CAS No. | 318237-99-9 |
| Molecular Formula | C18H14ClN3O3S |
| Molecular Weight | 387.84 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
Methyl 5-[(4-chlorophenyl)sulfanyl]-4-[(hydroxyimino)methyl]-1-phenyl-1H-pyrazole-3-carboxylate (CAS 318237-99-9), molecular formula C18H14ClN3O3S and molecular weight 387.84 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution, Methyl 5-[(4-chlorophenyl)sulfanyl]-4-[(hydroxyimino)methyl]-1-phenyl-1H-pyrazole-3-carboxylate is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 387.84 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
CATO manufactures Methyl 5-[(4-chlorophenyl)sulfanyl]-4-[(hydroxyimino)methyl]-1-phenyl-1H-pyrazole-3-carboxylate under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C18H14ClN3O3S |
| Molecular Weight | 387.84 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Methyl Standards
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- 4-Chlorophenyl 6-methyl-2-(p-tolyl)quinoline-4-carboxylate (CAS 355419-82-8)
- N-(2-(4-(4-chlorophenyl)piperazin-1-yl)-2-oxoethyl)-4-methoxybenzamide (CAS 338419-58-2)
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Recommended Standards
- 4-Chloro-N-(triphenylphosphoranylidene)aniline (CAS 31641-65-3)
- N-(4-acetylphenyl)-2-((5-(4-chlorophenyl)-1,3,4-oxadiazol-2-yl)thio)acetamide (CAS 84327-85-5)
- 4-((4'-Chloro-[1,1'-biphenyl])-4-sulfonamido)benzoic acid (CAS 885269-32-9)
- 1-((3-Chloro-5-(trifluoromethyl)pyridin-2-yl)methyl)-3-(2-isopropylphenyl)thiourea (CAS 326815-31-0)
- Ethyl 4-chloro-6-iodoquinoline-3-carboxylate (CAS 206257-60-5)
- 4-(Hydroxymethyl)pyridin-3-ol hydrochloride (CAS 67992-19-2)
- 4-(Phenylamino]-1-benzyl-4-piperidinecarbonitrile-13C6 (CAS 1189455-22-8)
- N-(4-Nitro-5,6,7,8-tetrahydronaphthalen-1-yl)acetamide (CAS 40153-45-5)
- 2-Hydroxy-3-methyl-5-nitropyridine (CAS 21901-34-8)
- 2-Cyclohexylisonicotinic acid (CAS 1367951-28-7)
- 3-Amino-1-(3,3-dimethylbutyl)pyridin-2(1h)-one (CAS 1248367-92-1)
- Chlorocycloheptane (CAS 2453-46-5)
- (3-Methylbenzyl)phosphonic acid (CAS 18945-65-8)
- Tirzepatide Impurity 10 (CAS CATO-C4X-324010)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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