5-Amino-2-(4-(3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)-2-sulfostyryl)benzenesulfonic acid CAS 119-74-4
| CAS No. | 119-74-4 |
| Molecular Formula | C18H17N3O7S2 |
| Molecular Weight | 451.47 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 5-Amino-2-(4-(3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)-2-sulfostyryl)benzenesulfonic acid (C18H17N3O7S2) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 12.0, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 451.47 g/mol, it falls into the moderately-high-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
5-Amino-2-(4-(3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)-2-sulfostyryl)benzenesulfonic acid (CAS 119-74-4) is a high-purity analytical reference standard with the molecular formula C18H17N3O7S2 and a molecular weight of 451.47 g/mol.
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.
As a certified reference material (CRM), 5-Amino-2-(4-(3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)-2-sulfostyryl)benzenesulfonic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C18H17N3O7S2 |
| Molecular Weight | 451.47 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 2 |
Related Amino Standards
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Recommended Standards
- 3,3,3-Trifluoro-1-(2-((3-methoxy-4-(4-methyl-1H-imidazol-1-yl)phenyl)amino)-6,7-dihydrothiazolo[5,4-c]pyridin-5(4H)-yl)propan-1-one (CAS 1077629-18-5)
- (S)-(9H-Fluoren-9-yl)methyl 4-(3-(tert-butoxy)-3-oxopropyl)-2,5-dioxooxazolidine-3-carboxylate (CAS 129288-39-7)
- Flucythrinate (CAS 70124-77-5)
- (S)-2-(2-(1-(((9H-Fluoren-9-yl)methoxy)carbonyl)pyrrolidine-2-carboxamido)acetamido)acetic acid (CAS 1569269-33-5)
- 2-Amino-6-(hydroxymethyl)-4-(4-methoxyphenyl)-8-oxo-4,8-dihydropyrano[3,2-b]pyran-3-carbonitrile (CAS 194282-56-9)
- 2-(10-([1,1'-Biphenyl]-3-yl)anthracen-9-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 1510788-38-1)
- tert-Butyl (2S,5S)-2,5-diphenylpiperazine-1-carboxylate (CAS 1241681-34-4)
- 1-(1,3-Benzodioxol-5-yl)imidazolidin-2-one (CAS 169547-80-2)
- (5,6-Bis-trifluoromethyl-pyridin-2-yl)-hydrazine (CAS 1246466-27-2)
- 4-(Aminomethyl)-N,N-dimethylpiperidine-1-sulfonamide hydrochloride (CAS 1394702-33-0)
- 2-(3-Fluorophenyl)propanenitrile (CAS 1096868-17-5)
- Methyl 2-(2-((5-benzyl-1,3,4-oxadiazol-2-yl)thio)acetamido)-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate (CAS 332163-26-5)
- Ethyl 8-Bromoimidazo[1,2-a]pyridine-2-carboxylate Hydrobromide (CAS 1332589-53-3)
- Semaglutide impurity 89 (CAS CATO-C4X-222689)
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