Pyridine hemisulfate CAS 18715-41-8
| CAS No. | 18715-41-8 |
| Molecular Formula | H2O4S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Pyridine hemisulfate is closely related to a carbohydrate-derived structure, an amide group, a sulfone group in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Pyridine hemisulfate (CAS 18715-41-8), molecular formula H2O4SC5H5N and molecular weight 177.17 g/mol, is a CATO reference standard with documented purity and traceability.
Pyridine hemisulfate (H2O4SC5H5N) contains a carbohydrate-derived structure, an amide group, 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | H2O4S 2*C5H5N |
| Molecular Weight | 177.17 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Pyridine Standards
- 2,2'-(Pyridine-2,6-diyl)bis(propan-2-ol) (CAS 100055-21-8)
- 2-(Pyridine-4-carbonyl)cyclohexan-1-one (CAS 100192-17-4)
- Pyridine, 3,3'-[5',5''-bis[3-(3-pyridinyl)phenyl][1,1':3',1'':3'',1'''-quaterphenyl]-3,3'''-diyl]bis- (CAS 1009033-94-6)
- Pyridine-3-sulfinic acid (CAS 101084-77-9)
- Pyridine-4-sulfinic acid (CAS 101084-78-0)
- Pyridine-3,5-diyldiboronic acid (CAS 1012085-48-1)
- Pyridine, 2-chloro-3-methoxy-4-nitro-, 1-oxide (CAS 101664-57-7)
- Pyridine-3,4-diol (CAS 10182-48-6)
Recommended Standards
- 3-Bromo-5,6,7-trifluoro-1H-indole (CAS 2759141-82-5)
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- Allyl 4-((2,4-dichlorobenzyl)oxy)-3-ethoxy-5-iodobenzoate (CAS 1706449-68-4)
- 3-(4,5-Dimethyl-4H-1,2,4-triazol-3-yl)piperidine (CAS 1250411-70-1)
- Iodo(5,10,15,20-tetramesitylporphyrinato)rhodium (CAS 85990-32-5)
- delta-Guanido-a-ketovaleric Acid (CAS 3715-10-4)
- 2-(3,3-Dimethylbutanoyl)benzonitrile (CAS 898764-17-5)
- Ethyl (S)-2-amino-3-(2-fluorophenyl)-2-methylpropanoate (CAS 1241683-19-1)
- [(4-chlorophenyl)(cyclopropyl)methyl](methyl)amine (CAS 1153551-29-1)
- Cholecystokinin Octapeptide (desulfated) (CAS 25679-24-7)
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