Hydroxy(pyridin-4-yl)methanesulfonic acid CAS 4872-28-0
| CAS No. | 4872-28-0 |
| Molecular Formula | C6H7NO4S |
| Molecular Weight | 189.19 g/mol |
| 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 Hydroxy(pyridin-4-yl)methanesulfonic acid.
Hydroxy(pyridin-4-yl)methanesulfonic acid (CAS 4872-28-0), molecular formula C6H7NO4S and molecular weight 189.19 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, an aromatic ring system, Hydroxy(pyridin-4-yl)methanesulfonic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 189.19 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C6H7NO4S |
| Molecular Weight | 189.19 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 |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Hydroxy Standards
- 4-(2-Hydroxy-ethylamino)-[1,2,5]thiadiazole-3-carboxylic acid (CAS 135086-65-6)
- α-Hydroxy-2-pyridinemethanesulfonic acid (CAS 3343-41-7)
- 2-Hydroxy-5-methyl-N-(prop-2-yn-1-yl)benzamide (CAS 1019128-10-9)
- 2-Hydroxy-3-methyl-N-(prop-2-yn-1-yl)benzamide (CAS 1019451-83-2)
- 6-hydroxy-2-(pyridin-2-yl)-1,4-dihydropyrimidin-4-one (CAS 10198-74-0)
- 4-Hydroxy-7-methoxy-2-methylquinoline (CAS 103624-90-4)
- 1-(2-Hydroxy-1-methyl-1H-indol-3-yl)ethanone (CAS 124043-91-0)
- N’-hydroxy-1-methyl-1H-indole-3-carboximidamide (CAS 125818-00-0)
Recommended Standards
- Dimethyl 2-thiocyanatomalonate (CAS 251577-80-7)
- Lanthionine Ketimine (CAS 83923-11-9)
- 6-Methoxypyrimidine-4-sulfonamide (CAS 82341-71-7)
- N-(4-Fluorophenyl)pyrazin-2-amine (CAS 94920-78-2)
- 3'-Fluoro-4'-methoxy-[1,1'-biphenyl]-4-amine (CAS 1048915-78-1)
- tert-Butyl 4-(2-(methylamino)-2-oxoethoxy)piperidine-1-carboxylate (CAS 1256483-64-3)
- (2,6-Di(pyridin-3-yl)phenyl)methanamine (CAS 1214327-74-8)
- 2-(6-Amino-5-cyano-4-(difluoromethyl)pyridin-3-yl)acetic acid (CAS 1805348-58-6)
- 5Bromo-3-phenoxypyrazin-2-amine (CAS 548793-12-0)
- 2-(3,4-Dimethylphenyl)-1H-indole-3-carbaldehyde (CAS 590391-01-8)
- Fluperolone Acetate (CAS 2119-75-7)
- (R)-2-Chloro-7-methyl-7,8-dihydropteridin-6(5H)-one (CAS 1435462-66-0)
- 2-((5-(4-(tert-Butyl)phenyl)-4-(4-methoxyphenyl)-4H-1,2,4-triazol-3-yl)thio)-1-(3-methoxyphenyl)ethanone (CAS 579440-57-6)
- Semaglutide Impurity 9 (CAS CATO-C4X-22269)
Why CATO?
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