Butanedioic acid, 2-sulfo-, sodium salt CAS 20526-58-3
| CAS No. | 20526-58-3 |
| Molecular Formula | C4H4O7S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Butanedioic acid, 2-sulfo-, sodium salt (CAS 20526-58-3), molecular formula C4H4O7SNa and molecular weight 219.12 g/mol, is a CATO reference standard with documented purity and traceability.
Butanedioic acid, 2-sulfo-, sodium salt (C4H4O7SNa) contains a carbohydrate-derived structure, a sulfone group. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
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 | C4H4O7S Na |
| Molecular Weight | 219.12 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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.) | 1962 |
| Sulfur Atoms | 1 |
Related Butanedioic Standards
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- Butanedioic Acid 1-[16,16-Bis(4-methoxyphenyl)-3,3-dioxido-7-oxo-16-phenyl-6,15-dioxa-3-thia-8-azahexadec-1-yl] Ester (CAS 178261-45-5)
- Butanedioic acid, 2-sulfo-, 1,4-bis(1-methylheptyl) ester, sodium salt (CAS 20727-33-7)
Recommended Standards
- 3-Methyl-2-(piperidin-3-yloxy)pyridine hydrochloride (CAS 1779126-53-2)
- 3,4-Dimethyl-n-{[2-(prop-2-en-1-yloxy)phenyl]methyl}aniline (CAS 851457-30-2)
- [(2R,6S)-6-methylmorpholin-2-yl]methanol;hydrochloride (CAS 2252434-77-6)
- 2-Chloro-6-(trifluoromethyl)benzyl alcohol (CAS 886500-21-6)
- 2-Bromo-1-chloro-1-iodotrifluoroethane (CAS 354-54-1)
- N-([1,3]Dioxolo[4',5':4,5]benzo[1,2-d]thiazol-6-yl)-1,3-dimethyl-1H-pyrazole-5-carboxamide (CAS 1013796-55-8)
- LRRK2-IN-1 (CAS 1234480-84-2)
- Dorzagliatin Impurity 15 (CAS CATO-C4X-344115)
- Butoxycarbonyl-PEG5-sulfonic acid (CAS 1817735-28-6)
- Semaglutide Impurity 137 (x TFA Salt) (CAS CATO-C4X-2226137)
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