2-((4-Aminophenyl)amino)-5-nitrobenzenesulfonic acid CAS 91-29-2
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 91-29-2 |
| Molecular Formula | C12H11N3O5S |
| Molecular Weight | 309.30 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-((4-Aminophenyl)amino)-5-nitrobenzenesulfonic acid (CAS 91-29-2) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C12H11N3O5S. Molecular weight: 309.30 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C12H11N3O5S |
| Molecular Weight | 309.30 g/mol |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Aminophenyl Standards
- 4-((4-Aminophenyl)amino)-3-nitrobenzenesulfonic acid (CAS 135-11-5)
- N-(2-aminophenyl)-4-hydroxy-1-methyl-2-oxo-1,2-dihydroquinoline-3-carboxamide (CAS 151449-78-4)
- 2-(4-Aminophenyl)-6-nitroquinoline-4-carboxylic acid (CAS 475474-44-3)
- 4-(2-(3-Aminophenyl)acetamido)benzene-1-sulfonyl fluoride (CAS 19188-70-6)
- 4-(2-(4-Aminophenyl)acetamido)benzene-1-sulfonyl fluoride (CAS 19188-73-9)
- 5-(4-Aminophenyl)-N-(p-tolyl)-1,3,4-thiadiazole-2-carboxamide (CAS 1142210-50-1)
- N-(3-aminophenyl)-2-(2,4-dichlorophenoxy)acetamide (CAS 75004-54-5)
- N-(4-aminophenyl)-2-(2,4-dichlorophenoxy)acetamide (CAS 92291-43-5)
Recommended Standards
- 1,1-Dimethylethyl N-[5-(dimethoxyphosphinyl)-4-oxopentyl]carbamate (CAS 342648-58-2)
- 3-((2,4-Diaminoquinazolin-5-yl)methoxy)-5-fluorobenzonitrile, >98% (HPLC) (CAS 2092917-19-4)
- (Hydroxy(pyridin-4-yl)methyl)diphenylphosphine oxide (CAS 260446-47-7)
- 4-(2,4-Dimethoxyphenyl)-1,3-dimethyl-4,5-dihydro-1H-1,2,4-triazol-5-one (CAS 861206-35-1)
- 1-(2,4-Difluorophenyl)-3,5-dimethyl-1h-pyrazole-4-carbaldehyde (CAS 1134818-07-7)
- 2-Methylbenzo[b]thiophene (CAS 1195-14-8)
- 2-(4-Fluorophenyl)propane-1,3-diamine dihydrochloride (CAS 78533-97-8)
- methyl 2-(5-fluoronaphthalen-1-yl)acetate (CAS 1261452-86-1)
- H-Ser-Ser-OH (CAS 6620-95-7)
- [y-Glu3]-Semaglutide Impurity 135 (CAS CATO-C4X-2226135)
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