2,2'-(thiobis(2-hydroxy-5,1-phenylene))bis(4H-benzo[e][1,3]oxazin-4-one) CAS 1688656-86-1
| CAS No. | 1688656-86-1 |
| Molecular Formula | C28H16N2O6S |
| Molecular Weight | 508.50 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.
CATO supplies 2,2'-(thiobis(2-hydroxy-5,1-phenylene))bis(4H-benzo[e][1,3]oxazin-4-one) (CAS 1688656-86-1), a certified reference material (molecular formula C28H16N2O6S, MW 508.50 g/mol) for analytical method development and quality control.
2,2'-(thiobis(2-hydroxy-5,1-phenylene))bis(4H-benzo[e][1,3]oxazin-4-one) (C28H16N2O6S) contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
Physical & Chemical Properties
| Molecular Formula | C28H16N2O6S |
| Molecular Weight | 508.50 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) | 22.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1994 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related thiobis Standards
- 5,5'-((Thiobis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione) (CAS 52256-85-6)
- 3,3-[Thiobis(2,1-phenylene-2,1-diazenediyl)]bis[6-hydroxybenzoic Acid (CAS 72245-48-8)
- 3,3'-((Thiobis(4,1-phenylene))bis(sulfanediyl))bis(1-(thiophen-2-yl)propan-1-one) (CAS 868256-41-1)
- Thiobis(ethane-2,1-diyl) didodecanoate (CAS 4275-31-4)
- 2,2'-Thiobis(N,N-dicyclohexylacetamide) (CAS 849629-03-4)
- 5,5'-Thiobis(2-phenylisoindoline-1,3-dione) (CAS 58974-89-3)
- 3,3'-((Thiobis(4,1-phenylene))bis(sulfanediyl))bis(1-(p-tolyl)propan-1-one) (CAS 882748-82-5)
- 4,4'-(Thiobis(methylene))bis(2,6-di-tert-butylphenol) (CAS 1620-93-5)
Recommended Standards
- 1-((2R)-1-[(11bR)-Dinaphtho[2,1-d:1',2'-f][1,3,2]dioxaphosphepin-4-yloxy]propan-2-yl}-3-phenylurea (CAS 1198080-53-3)
- Larotrectinib Impurity 10 (CAS 2753097-86-6)
- 4-((4-(Hexylcarbamoyl)-2-(naphthalen-1-yl)oxazol-5-yl)methyl)phenyl dihydrogen phosphate (CAS 1003580-86-6)
- tert-Butyl 3-(6-(1-(2,2-difluorobenzo[d][1,3]dioxol-5-yl)cyclopropanecarboxamido)-3-methylpyridin-2-yl)benzoate (CAS 1160221-25-9)
- (3-Cyclopropyl-5-(thiazol-5-yl)phenyl)boronic acid (CAS 2225171-65-1)
- 4-(4-Methoxyphenyl)-1-(4-pyridylcarbonyl)semicarbazide (CAS 6270-66-2)
- (2-Bromobenzyl)(4-fluorophenyl)sulfane (CAS 1001161-72-3)
- tert-butyl (3S)-3-fluoro-4-oxopiperidine-1-carboxylate (CAS 1450879-67-0)
- 3-Tert-butyl-1-(2-chloropropanoyl)urea (CAS 879318-96-4)
- 2-(2,6-Difluorophenyl)-2-oxoacetaldehyde hydrate (CAS 745783-92-0)
- Nalmefene HCl (CAS 58895-64-0)
- N-[1-(4-Methylbenzyl)-1,3-dihydro-2H-1,3-benzimidazol-2-yliden]benzenesulfonamide (CAS 860787-87-7)
- 2-(2-Chlorophenyl)-1-(furan-2-yl)ethan-1-one (CAS 1179791-53-7)
- Tau Peptide (306-336) (Repeat 3 Domain) trifluoroacetate salt (CAS 330456-26-3)
Why CATO?
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