5-Amino-2-nitrobenzenesulfonic acid CAS 551-91-7
| CAS No. | 551-91-7 |
| Molecular Formula | C16H13N3O4 |
| Molecular Weight | 311.29 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 5-Amino-2-nitrobenzenesulfonic acid is closely related to a flavonoid core, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
5-Amino-2-nitrobenzenesulfonic acid (CAS 551-91-7), molecular formula C16H13N3O4 and molecular weight 311.29 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C16H13N3O4, 5-Amino-2-nitrobenzenesulfonic acid contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 311.29 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 5-Amino-2-nitrobenzenesulfonic acid 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 | C16H13N3O4 |
| Molecular Weight | 311.29 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°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 |
Related Amino Standards
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Recommended Standards
- 5-[(1,3-dioxo-2,3-dihydro-1h-isoindol-2-yl)methyl]-2-methoxybenzoic acid (CAS 556016-14-9)
- 5-bromo-1-(tert-butyldimethylsilyl)-1H-pyrrolo[2,3-b]pyridine (CAS 754214-54-5)
- 5-[(1,3-Dihydro-1,3-dioxo-2H-isoindol-2-yl)methyl]-2-hydroxy-3-methylbenzoic acid (CAS 781626-90-2)
- 6-O-Ethylguanosine (CAS 39708-01-5)
- 5-Methyl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyridin-3-amine (CAS 2289603-27-4)
- 3-Methoxyphenylboronic acid (CAS 10365-98-7)
- 3-(4-Fluorophenyl)-2-(4-nitrophenyl)propanenitrile (CAS 1254177-52-0)
- Semaglutide impurity 100 (CAS CATO-C4X-2226100)
- 1-Allylcyclopent-3-en-1-amine (CAS 2110264-05-4)
- propan-2-yl 4-chlorobenzoate (CAS 22913-11-7)
- 2,4-dichloro-5-[(pyridin-3-ylmethyl)sulfamoyl]benzoic acid (CAS 863416-28-8)
- 2-(4-Methylpiperazin-1-yl)-4-(methylsulfonyl)benzaldehyde (CAS 1197193-37-5)
- Jatropholone B (CAS 71386-38-4)
- Liraglutide Sodium Salt (CAS 204656-20-2（free base）)
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