1-[4-(6-Methyl-2-benzothiazolyl)phenyl]pyrrole-2,5-dione CAS 19735-68-3
| CAS No. | 19735-68-3 |
| Molecular Formula | C18H12N2O2S |
| Molecular Weight | 320.37 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
1-[4-(6-Methyl-2-benzothiazolyl)phenyl]pyrrole-2,5-dione (CAS 19735-68-3), molecular formula C18H12N2O2S and molecular weight 320.37 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 1-[4-(6-Methyl-2-benzothiazolyl)phenyl]pyrrole-2,5-dione (C18H12N2O2S) is characterized by a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
Physical & Chemical Properties
| Molecular Formula | C18H12N2O2S |
| Molecular Weight | 320.37 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 |
| Degree of Unsaturation (DBE) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Methyl Standards
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- 4-(6-Methyl-2-benzothiazolyl)phenylisocyanate (CAS 67229-93-0)
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Recommended Standards
- 10-(4-Nitrophenyl)-10H-phenothiazine (CAS 19606-94-1)
- 1-(2-(Tert-butylthio)ethyl)-3-(3-(trifluoromethyl)phenyl)urea (CAS 866008-90-4)
- Eniporide (CAS 176644-21-6)
- 1,3-Diphenyl-1H-thieno[2,3-c]pyrazole-5-carboxylic acid (CAS 24086-34-8)
- 2-Chloro-N-(2-((3-chloro-5-(trifluoromethyl)pyridin-2-yl)amino)ethyl)acetamide (CAS 339096-66-1)
- (4-Bromo-2-fluorophenyl)(3-(morpholinomethyl)phenyl)methanone (CAS 898792-04-6)
- 3-Cyclopropyl-6,7-dihydro-5H-cyclopenta[b]isoxazolo[4,5-e]pyridine-4-carboxylic acid (CAS 1263214-15-8)
- 2-(4-((3,5-Difluorobenzyl)oxy)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 2246693-81-0)
- 3,3-Difluorocyclohexanamine Hydrochloride (CAS 921602-77-9)
- 2-Bromo-3-cyclopropoxyisonicotinamide (CAS 1243354-55-3)
- 2-Hydrazinyl-4-(phenylsulfanyl)pyrimidine (CAS 1518301-10-4)
- 1-(4-Fluorocyclohexyl)ethan-1-one (CAS 1554368-43-2)
- 3-Chloro-4-hydroxybenzene-1-carbothioamide (CAS 35613-43-5)
- Semaglutide impurity 93 (CAS CATO-C4X-222693)
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