2-Aminopyridine-3-sulfonic acid CAS 16250-07-0
| CAS No. | 16250-07-0 |
| Molecular Formula | C5H6N2O3S |
| Molecular Weight | 174.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
2-Aminopyridine-3-sulfonic acid (CAS 16250-07-0), molecular formula C5H6N2O3S and molecular weight 174.18 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, 2-Aminopyridine-3-sulfonic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 174.18 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).
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 | C5H6N2O3S |
| Molecular Weight | 174.18 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.) | 1961 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Aminopyridine Standards
- 6-Aminopyridine-2-sulfonic acid (CAS 109682-22-6)
- 2-Aminopyridine-5-sulfonic Acid (CAS 16250-08-1)
- 3-Aminopyridine-2-sulfonic acid (CAS 54247-51-7)
- 4-aminopyridine-3-sulfonic acid (CAS 29452-57-1)
- 5-Aminopyridine-3-sulfonic acid (CAS 62009-35-2)
- 2-Aminopyridine-4-sulfonamide (CAS 1248057-21-7)
- 3-aminopyridine-2-sulfonamide (CAS 94527-46-5)
- 4-Aminopyridine-2-sulfonamide (CAS 75903-57-0)
Recommended Standards
- 2-hydroxypyridine-3-sulfonamide (CAS 1566403-08-4)
- 3-hydroxypyridine-2-sulfonamide (CAS 145099-44-1)
- 5-Hydroxy-2-(methylsulfonyl)pyrimidine (CAS 16290-90-7)
- 1-(Methylsulfonyl)-1H-imidazole-4-carbaldehyde (CAS 1426387-80-5)
- 2-Bromo-6-(chloromethyl)-3-fluoropyridine (CAS 1227584-96-4)
- 5,6-Diamino-4-hydroxypyrimidine-13C,15N (CAS 1246820-56-3)
- Tert-butyl N-methyl-N-(piperidin-4-yl)glycinate (CAS 1156665-15-4)
- 1-Chloro-2-methoxy-4-methylbenzene (CAS 73909-16-7)
- N-(3-(2-Phenylmorpholino)propyl)-2-(trifluoromethyl)benzamide (CAS 953915-09-8)
- (2-Bromo-6-hydroxy-4-methylphenyl)[1-(2-hydroxyethyl)-1H-pyrazol-5-yl]methanone (CAS 1858256-80-0)
- Ethyl 5-chloro-3-iodoimidazo[1,2-a]pyridine-2-carboxylate (CAS 885271-45-4)
- (2S,3S,4S,5R,6R)-5-(((2S,3R,4S,5R,6R)-4,5-Dihydroxy-6-(hydroxymethyl)-3-(((2S,3R,4R,5R,6S)-3,4,5-trihydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)tetrahydro-2H-pyran-2-yl)oxy)-3,4-dihydroxy-6-(((3S,4S,4aR,6aR,6bS,8aR,9R,12aS,14aR,14bR)-9-(((R)-5-hydroxy-6-methyl-4-oxo-3,4-dihydro-2H-pyran-2-yl)oxy)-4-(hydroxymethyl)-4,6a,6b,8a,11,11,14b-heptamethyl-1,2,3,4,4a,5,6,6a,6b,7,8,8a,9,10,11,12,12a,14,14a,14b-icosahydropicen-3-yl)oxy)tetrahydro-2H-pyran-2-carboxylic acid (CAS 143519-54-4)
- 4-(4-Chloro-2-fluorophenoxy)aniline (CAS 98918-37-7)
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