Pyridine sulfate CAS 543-54-4
| CAS No. | 543-54-4 |
| Molecular Formula | O4S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 175.16 g/mol gives Pyridine sulfate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies Pyridine sulfate (CAS 543-54-4), a certified reference material (molecular formula O4SC5H5N, MW 175.16 g/mol) for analytical method development and quality control.
Based on its molecular formula O4SC5H5N, Pyridine sulfate contains a carbohydrate-derived structure, an amide group, a sulfone group; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 175.16 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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures Pyridine sulfate under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | O4S C5H5N |
| Molecular Weight | 175.16 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.) | 1957 |
| 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
- (S)-1-Cyclopropylpyrrolidine-2-carboxamide (CAS 477575-60-3)
- 5-Fluoro-2-oxoindoline-7-carboxylic acid (CAS 1225635-33-5)
- 1-(3-Chlorophenyl)-2-sulfanyl-4,5-dihydro-1h-imidazol-5-one (CAS 42351-67-7)
- Benzopyrene Impurity 1 (CAS 65199-11-3)
- 8-Chloroquinolin-5-amine hydrochloride (CAS 1156980-60-7)
- N'-(3-chlorobenzoyl)-1-(3-fluorobenzyl)piperidine-4-carbohydrazide (CAS 478259-07-3)
- 3-Amino-3-(3-(benzyloxy)phenyl)propanoic acid (CAS 299439-16-0)
- (S)-Benzyl 4-(4-aminobutyl)-2,5-dioxooxazolidine-3-carboxylate (CAS 99700-36-4)
- 5-(Ethylsulfonyl)-4-(3-nitrophenyl)pyrimidin-2-amine (CAS 1707668-48-1)
- Semaglutide (CAS 910463-68-2（free base）)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com