4-((4-Chlorophenyl)thio)-5-morpholino-2-(p-tolyl)pyridazin-3(2H)-one CAS 551921-37-0
| CAS No. | 551921-37-0 |
| Molecular Formula | C21H20ClN3O2S |
| Molecular Weight | 413.92 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 4-((4-Chlorophenyl)thio)-5-morpholino-2-(p-tolyl)pyridazin-3(2H)-one (C21H20ClN3O2S) contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 13.0, corresponding to approximately 13 ring(s) or double-bond equivalent(s). With a molecular weight of 413.92 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
4-((4-Chlorophenyl)thio)-5-morpholino-2-(p-tolyl)pyridazin-3(2H)-one (CAS 551921-37-0), molecular formula C21H20ClN3O2S and molecular weight 413.92 g/mol, is a CATO reference standard with documented purity and traceability.
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-((4-Chlorophenyl)thio)-5-morpholino-2-(p-tolyl)pyridazin-3(2H)-one 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 | C21H20ClN3O2S |
| Molecular Weight | 413.92 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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.) | 1984 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Chlorophenyl Standards
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Recommended Standards
- 2-((4-Allyl-5-(pyridin-2-yl)-4H-1,2,4-triazol-3-yl)thio)-N-(2-chloro-4,6-dimethylphenyl)acetamide (CAS 618880-35-6)
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- 1,3,5-Tris(5,5-dimethyl-1,3,2-dioxaborinan-2-yl)benzene (CAS 916330-18-2)
- Ethyl 4-([1,1'-biphenyl]-4-yl)-2-(3-chloropropanamido)thiophene-3-carboxylate (CAS 315684-10-7)
- 6-(Difluoromethyl)-2-sulfanylidene-1,2,3,4-tetrahydropyrimidin-4-one (CAS 1204298-76-9)
- 2-Amino-3-(3-(trifluoromethyl)phenyl)propan-1-ol hydrochloride (CAS 21176-61-4)
- 6-(Bromomethyl)-3,4-dihydro-2h-1,5-benzodioxepine (CAS 499770-96-6)
- 1-(4-fluorophenyl)hexahydropyrimidine-2,4-dione (CAS 947323-27-5)
- 4-(2-(Trifluoromethyl)phenyl)butan-2-ol (CAS 1339398-17-2)
- [rel-(1R,5S,6R)-3-Benzyl-3-azabicyclo[3.1.0]hexan-6-yl]methanol hydrochloride (CAS 1422130-51-5)
- N-((1-(Difluoromethyl)-1H-pyrazol-5-yl)methyl)-1-propyl-1H-pyrazol-3-amine hydrochloride (CAS 1856044-44-4)
- 3-[pentyl(propyl)amino]propanoic acid (CAS 1367850-29-0)
- 6-(4-(2-(4-Isopropylphenyl)acetyl)piperazin-1-yl)pyridazine-3-carbonitrile (CAS 2170608-82-7)
- Hexapeptide-9 (CAS 885024-94-2)
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