2-(Diphenylamino)-5-(2-(3-ethylbenzo[d]oxazol-2(3H)-ylidene)ethylidene)thiazol-4(5H)-one CAS 2718-77-6
| CAS No. | 2718-77-6 |
| Molecular Formula | C26H21N3O2S |
| Molecular Weight | 439.53 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 2-(Diphenylamino)-5-(2-(3-ethylbenzo[d]oxazol-2(3H)-ylidene)ethylidene)thiazol-4(5H)-one.
2-(Diphenylamino)-5-(2-(3-ethylbenzo[d]oxazol-2(3H)-ylidene)ethylidene)thiazol-4(5H)-one (CAS 2718-77-6) is a high-purity analytical reference standard with the molecular formula C26H21N3O2S and a molecular weight of 439.53 g/mol.
Structurally, 2-(Diphenylamino)-5-(2-(3-ethylbenzo[d]oxazol-2(3H)-ylidene)ethylidene)thiazol-4(5H)-one (C26H21N3O2S) contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 18.0, corresponding to approximately 18 ring(s) or double-bond equivalent(s). With a molecular weight of 439.53 g/mol, it falls into the moderately-high-molecular-weight range. 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), 2-(Diphenylamino)-5-(2-(3-ethylbenzo[d]oxazol-2(3H)-ylidene)ethylidene)thiazol-4(5H)-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 | C26H21N3O2S |
| Molecular Weight | 439.53 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 |
| Degree of Unsaturation (DBE) | 18.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Diphenylamino Standards
- 4-(Diphenylamino)benzaldehyde diphenylhydrazone (CAS 82532-76-1)
- 5'-(4-(Diphenylamino)phenyl)-[2,2'-bithiophene]-5-carbaldehyde (CAS 762269-61-4)
- 2-(5-(4-(Diphenylamino)styryl)thiophen-2-yl)ethene-1,1,2-tricarbonitrile (CAS 163630-46-4)
- 2-((7-(4-(Diphenylamino)phenyl)benzo[c][1,2,5]thiadiazol-4-yl)methylene)malononitrile (CAS 1393343-60-6)
- Ethyl 6-(4-(diphenylamino)phenyl)-2-oxo-2H-chromene-3-carboxylate (CAS 1056693-13-0)
- 4-(4-(Diphenylamino)benzylidene)-3-phenylisoxazol-5(4H)-one (CAS 65156-09-4)
- (2-((4-(Diphenylamino)phenyl)dimethylsilyl)phenyl)methanol (CAS 953412-86-7)
- 2'-(Diphenylamino)-[1,1':4',1''-terphenyl]-4,4''-dicarboxylic acid (CAS 2171541-41-4)
Recommended Standards
- Ziresovir, >98% (HPLC) (CAS 1422500-60-4)
- 3-(5-((2-((4-Ethoxyphenyl)amino)-2-oxoethyl)thio)-4-methyl-4H-1,2,4-triazol-3-yl)-N-phenylpropanamide (CAS 5444-42-8)
- N-(4-fluorobenzyl)-2-((3-methyl-4-oxo-7-phenyl-3,4-dihydrothieno[3,2-d]pyrimidin-2-yl)thio)acetamide (CAS 1040632-02-7)
- 4-(4-(6-Methoxynaphthalen-2-yl)-2-(4-(methylsulfinyl)phenyl)-1H-imidazol-5-yl)pyridine (CAS 948557-43-5)
- Acrolein 2,4-Dinitrophenylhydrazone-d3 (CAS 259824-62-9)
- 4-Chloro-3-fluorophenyl magnesium bromide solution (CAS 170793-00-7)
- 3-(3-Chlorophenyl)thieno[3,2-d]pyrimidine-2,4(1H,3H)-dione (CAS 1255784-16-7)
- 4-(1-Ethyl-1h-imidazol-2-yl)butan-2-one (CAS 1344059-48-8)
- 2-Amino-2-(4-ethynylphenyl)ethan-1-ol (CAS 1824444-67-8)
- 3-(2,5-Dimethoxyphenyl)azetidin-3-ol (CAS 1388073-11-7)
- 2-(Benzo[1,3]dioxol-5-yloxy)-propionic acid (CAS 106690-34-0)
- H-D-Ser(tBu)-OtBu.HCl (CAS 179559-35-4)
- 4,4'-Bipyridine 1,1'-Dioxide (CAS 24573-15-7)
- Semaglutide Impurity 3 (CAS CATO-C4X-22263)
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