Pyrazine-2-sulfonic acid CAS 139263-49-3
| CAS No. | 139263-49-3 |
| Molecular Formula | C4H4N2O3S |
| Molecular Weight | 160.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C4H4N2O3S, Pyrazine-2-sulfonic acid contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 160.15 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO supplies Pyrazine-2-sulfonic acid (CAS 139263-49-3), a certified reference material (molecular formula C4H4N2O3S, MW 160.15 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.
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 | C4H4N2O3S |
| Molecular Weight | 160.15 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1996 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Pyrazine Standards
- Pyrazine-2-sulfonamide (CAS 1195533-51-7)
- Pyrazine-2-sulfonyl fluoride (CAS 2090368-34-4)
- 1,1'-(Pyrazine-2,6-diyl)diethanone (CAS 132855-06-2)
- 1,1'-(Pyrazine-2,5-diyl)bis(ethan-1-one) (CAS 39248-49-2)
- pyrazine-2-carbonyl azide (CAS 75322-66-6)
- Pyrazine-2,3-dicarboxamide (CAS 6164-78-9)
- Pyrazine-2,5-dicarboxamide (CAS 41110-27-4)
- Pyrazine,2-methoxy-6-(1-methylpropyl)- (CAS 30712-68-6)
Recommended Standards
- 4-Fluoro-1H-indole-3-carbonitrile (CAS 1260759-82-7)
- 6-Fluoroindole-5-carbonitrile (CAS 1427358-21-1)
- 5-Fluoro-1H-indole-6-carbonitrile (CAS 1201149-04-3)
- 4-Fluoro-1H-indole-6-carbonitrile (CAS 1427389-62-5)
- 1-(Phenylsulfonyl)indole (CAS 40899-71-6)
- 1-(4-Fluorobenzoyl)-3-methylpiperazine (CAS 178624-89-0)
- N-((4-(diethylamino)-2-methylphenyl)carbamothioyl)benzamide (CAS 862713-23-3)
- 5-(4-Fluorophenyl)-2-oxo-N-propyloxazolidine-3-carboxamide (CAS 34725-12-7)
- cis-3,3a,4,5,6,6a-hexahydro-2H-furo[2,3-c]pyrrole;hydrochloride (CAS 1361220-22-5)
- 3-Bromo-4-(trifluoromethyl)pyridin-2(1H)-one (CAS 1227591-86-7)
- 4-[(3-Methyl-2-butenyl)oxy]piperidinehydrochloride (CAS 1185044-73-8)
- 6-Nitro-1,2,3,4-tetrahydroisoquinoline (hydrobromide) (CAS 1187932-26-8)
- 1,3,5-Tris((pyridin-4-ylthio)methyl)benzene (CAS 862014-52-6)
- Tirzepatide Impurity 22 X TFA Salt (CAS CATO-C4X-324022)
Why CATO?
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