2303-01-7 3,3-Bis(4-hydroxy-2-methylphenyl)-3H-benzo[c][1,2]oxathiole 1,1-dioxide 3-cresolpurple 4,4 inverted exclamation mark -(3h-2,1-benzoxathiol-3-ylidene)bis(3-methylphenol)s,s-dioxide 4,4 inverted exclamation mark -(3h-2,1-benzoxathiol-3-ylidene)bis(m-cresol)s,s-dioxide cresol purple cresolpurple(non-specificname) m-cresolsulfonphthalein phenol,4,4 inverted exclamation mark -(3h-2,1-benzoxathiol-3-ylidene)bis(3-methyl-,s,s-dioxide phenol,4,4 inverted exclamation mark -(3h-2,1-benzoxathiol-3-ylidene)bis[3-methyl-,s,s-dioxide pourpredem-cresol CAS 2303-01-7
| CAS No. | 2303-01-7 |
| Molecular Formula | C21H30O5S |
| Molecular Weight | 394.52 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 2303-01-7 3,3-Bis(4-hydroxy-2-methylphenyl)-3H-benzo[c][1,2]oxathiole 1,1-dioxide 3-cresolpurple 4,4 inverted exclamation mark -(3h-2,1-benzoxathiol-3-ylidene)bis(3-methylphenol)s,s-dioxide 4,4 inverted exclamation mark -(3h-2,1-benzoxathiol-3-ylidene)bis(m-cresol)s,s-dioxide cresol purple cresolpurple(non-specificname) m-cresolsulfonphthalein phenol,4,4 inverted exclamation mark -(3h-2,1-benzoxathiol-3-ylidene)bis(3-methyl-,s,s-dioxide phenol,4,4 inverted exclamation mark -(3h-2,1-benzoxathiol-3-ylidene)bis[3-methyl-,s,s-dioxide pourpredem-cresol (C21H30O5S) is characterized by a flavonoid core, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
2303-01-7 3,3-Bis(4-hydroxy-2-methylphenyl)-3H-benzo[c][1,2]oxathiole 1,1-dioxide 3-cresolpurple 4,4 inverted exclamation mark -(3h-2,1-benzoxathiol-3-ylidene)bis(3-methylphenol)s,s-dioxide 4,4 inverted exclamation mark -(3h-2,1-benzoxathiol-3-ylidene)bis(m-cresol)s,s-dioxide cresol purple cresolpurple(non-specificname) m-cresolsulfonphthalein phenol,4,4 inverted exclamation mark -(3h-2,1-benzoxathiol-3-ylidene)bis(3-methyl-,s,s-dioxide phenol,4,4 inverted exclamation mark -(3h-2,1-benzoxathiol-3-ylidene)bis[3-methyl-,s,s-dioxide pourpredem-cresol (CAS 2303-01-7), molecular formula C21H30O5S and molecular weight 394.52 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.
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.
Physical & Chemical Properties
| Molecular Formula | C21H30O5S |
| Molecular Weight | 394.52 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Sulfur Atoms | 1 |
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