4-Cyanopyridine-2-sulfonic acid CAS 744987-72-2
| CAS No. | 744987-72-2 |
| Molecular Formula | C6H4N2O3S |
| Molecular Weight | 184.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Cyanopyridine-2-sulfonic acid (CAS 744987-72-2), molecular formula C6H4N2O3S and molecular weight 184.17 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 4-Cyanopyridine-2-sulfonic acid (C6H4N2O3S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 184.17 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C6H4N2O3S |
| Molecular Weight | 184.17 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1986 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Cyanopyridine Standards
- 5-cyanopyridine-2-sulfonamide (CAS 1250047-59-6)
- 4-Cyanopyridine-2-sulfonamide (CAS 1251259-15-0)
- 3-Cyanopyridine-2-sulfonamide (CAS 1251270-74-2)
- 2-Cyanopyridine-4-sulfonamide (CAS 1343775-57-4)
- 2-cyanopyridine-3-sulfonamide (CAS 1537550-29-0)
- 5-cyanopyridine-3-sulfonamide (CAS 1803597-63-8)
- 5-Cyanopyridine-2-sulfonyl fluoride (CAS 1934652-54-6)
- 3-Cyanopyridine-2-sulfonyl fluoride (CAS 1935016-55-9)
Recommended Standards
- 3-Hydroxythieno[2,3-d]pyrimidine-2,4(1H,3H)-dione (CAS 53229-49-5)
- 4-Fluoro-N,N-dimethyl-2-nitroaniline (CAS 69261-01-4)
- 3-Fluoro-N-hydroxy-4-methoxybenzimidamide (CAS 934605-95-5)
- 4-Sulfobenzenediazoniumhydroxide (CAS 305-80-6)
- methyl 4-chloropyrrolo[2,1-f][1,2,4]triazine-7-carboxylate (CAS 1780770-93-5)
- n,n-Diethylpyrrolidin-3-amine (CAS 20984-81-0)
- Aflatoxin B1 and B2 in Feed (CAS CATO-CQCM102172)
- 3-Methylbenzoyl isocyanate (CAS 5893-29-8)
- 4-(3-(1,1-Dioxidotetrahydrothiophen-3-yl)ureido)benzoic acid (CAS 1282946-53-5)
- 2-(2,6-difluoro-3-methylphenyl)acetaldehyde (CAS 1256477-03-8)
- 2-Bromo-4,6-dimethylnicotinic acid (CAS 618397-77-6)
- 3-(3-Chlorophenyl)cyclobutan-1-amine hydrochloride (CAS 1354960-26-1)
- Ethyl 5-amino-2-methylpyrimidine-4-carboxylate (CAS 1393541-03-1)
- Des-Pro36-37-Tirzepatide (CAS CATO-CPTD788938)
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