Benzenesulfonic acid sesquihydrate CAS 5928-72-3
| CAS No. | 5928-72-3 |
| Molecular Formula | 2*C6H6O3S |
| Molecular Weight | N/A |
| 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 Benzenesulfonic acid sesquihydrate.
Benzenesulfonic acid sesquihydrate (CAS 5928-72-3), molecular formula C6H6O3SH2O and molecular weight 176.19 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, Benzenesulfonic acid sesquihydrate is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 176.19 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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.
CATO manufactures Benzenesulfonic acid sesquihydrate under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | 2*C6H6O3S 3*H2O |
| Molecular Weight | 176.19 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1958 |
| Sulfur Atoms | 1 |
Related Benzenesulfonic Standards
- Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis[5-[4-(sulfophenyl)-2H-1,2,3-triazol-2-yl]-, sodium salt (1:x) (CAS 106906-28-9)
- Benzenesulfonic acid, 4,4',4'',4'''-[carbonylbis[imino-5,1,3-benzenetriylbis(carbonylimino)]]tetrakis-, tetrasodium salt (CAS 111150-22-2)
- Benzenesulfonic Acid Impurity 4 (CAS 116-50-7)
- Benzenesulfonic acid, 2,5-dihydroxy-, calcium salt, hydrate (2:1:?) (CAS 117552-78-0)
- Benzenesulfonic acid, 4-[(2-methyl-2-propen-1-yl)oxy]-, sodium salt (CAS 1208-67-9)
- Benzenesulfonic Impurity 3 (CAS 1352414-81-3)
- Benzenesulfonic Impurity 2 (CAS 1352414-88-0)
- Benzenesulfonic acid, (acetylamino)- (CAS 138721-63-8)
Recommended Standards
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- 5-Methyl-3,4-dihydroisoquinolin-1(2H)-one (CAS 129075-56-5)
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- 1-(2-Chloro-7-methoxyquinolin-3-yl)ethanol (CAS 1017428-63-5)
- Neuropeptide Y (22-36) (CAS 119019-65-7)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com