4-Hydroxybenzenesulfonic Acid Sodium Salt CAS 825-90-1
| CAS No. | 825-90-1 |
| Molecular Formula | C6H5O4S |
| 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 4-Hydroxybenzenesulfonic Acid Sodium Salt.
CATO supplies 4-Hydroxybenzenesulfonic Acid Sodium Salt (CAS 825-90-1), a certified reference material (molecular formula C6H5O4SNa, MW 196.15 g/mol) for analytical method development and quality control.
The molecular framework of 4-Hydroxybenzenesulfonic Acid Sodium Salt (C6H5O4SNa) is characterized by a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 4-Hydroxybenzenesulfonic Acid Sodium Salt 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 | C6H5O4S Na |
| Molecular Weight | 196.15 g/mol |
| Purity | >95% |
| 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) | 4.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Sulfur Atoms | 1 |
Related Hydroxybenzenesulfonic Standards
Recommended Standards
- 2-(Benzo[d]thiazol-2-ylthio)-N-(3-(trifluoromethyl)phenyl)acetamide (CAS 296273-03-5)
- (E)-3-((4-(4-(3-chloro-5-(trifluoromethyl)pyridin-2-yl)piperazin-1-yl)phenyl)amino)-1-(4-fluorophenyl)prop-2-en-1-one (CAS 478262-27-0)
- (1-(Ethylsulfonyl)azetidin-3-yl)methanamine (CAS 1462999-01-4)
- 4-Chloro-2-(methylsulfonyl)benzoic acid (CAS 142994-03-4)
- (R)-6-Phenyltetrahydro-2H-pyran-2-one (CAS 112607-33-7)
- n,n-Bis(2-hydroxyethyl)-3-carboxybenzenesulfonamide (CAS 6628-11-1)
- 2-Amino-1-(4-methoxyphenyl)-2-methylpropane (CAS 56490-94-9)
- Cefdinir Impurity 89 (CAS CATO-C4X-121089)
- 3-(tert-Butoxy)-2-isopropoxyphenol (CAS 1243364-05-7)
- Semaglutide Impurity 140 (CAS CATO-C4X-2226140)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
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