2-Phenyl-5-Benzimidazolesulfonic Acid CAS 27503-81-7
| CAS No. | 27503-81-7 |
| Molecular Formula | C13H10N2O3S |
| Molecular Weight | 274.30 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 2-Phenyl-5-Benzimidazolesulfonic Acid (C13H10N2O3S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 274.30 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
CATO supplies 2-Phenyl-5-Benzimidazolesulfonic Acid (CAS 27503-81-7), a certified reference material (molecular formula C13H10N2O3S, MW 274.30 g/mol) for analytical method development and quality control.
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-Phenyl-5-Benzimidazolesulfonic Acid 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 | C13H10N2O3S |
| Molecular Weight | 274.30 g/mol |
| Purity | >95% |
| 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1964 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Phenyl Standards
- 1H-Benzimidazolesulfonic acid, 2-heptadecyl-1-methyl- (CAS 68966-82-5)
- 1H-Benzimidazolesulfonic acid, 2-[7-(diethylamino)-2-oxo-2H-1-benzopyran-3-yl]-, sodium salt (CAS 70267-73-1)
- 1H-Benzimidazolesulfonic acid, 2-heptadecyl-1-[(3-sulfophenyl)methyl]-, sodium salt (1:2) (CAS 68228-07-9)
- 1H-Benzimidazolesulfonic acid, 2-heptadecyl-1-[(sulfophenyl)methyl]-, sodium salt (CAS 31135-57-6)
Recommended Standards
- 917096-84-5 N-(2-Aminoethyl)-4-(trifluoromethyl)benzene-1-sulfonamide DTXSID10656219 (CAS 917096-84-5)
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- 6,7-Dihydro-5H-cyclopenta[c]pyridin-6-amine dihydrochloride (CAS 1909318-69-9)
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