2-Amino-4-sulfobenzoic acid CAS 98-43-1
| CAS No. | 98-43-1 |
| Molecular Formula | C7H7NO5S |
| Molecular Weight | 217.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
2-Amino-4-sulfobenzoic acid (CAS 98-43-1) is a high-purity analytical reference standard with the molecular formula C7H7NO5S and a molecular weight of 217.20 g/mol.
Structurally, 2-Amino-4-sulfobenzoic acid (C7H7NO5S) 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 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 217.20 g/mol, it falls into the medium-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.
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 | C7H7NO5S |
| Molecular Weight | 217.20 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
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Recommended Standards
- 2-Fluoro-4-(pyridin-3-yl)benzoic acid (CAS 370864-62-3)
- 2-[(3-methyl-4-nitro-1h-pyrazol-5-yl)sulfanyl]acetic acid (CAS 879565-31-8)
- 2-FLuoro-4-nitrobiphenyl (CAS 391-04-8)
- 2-(Methylsulfonyl)-4-nitrophenol (CAS 208191-64-4)
- tert-Butyl (S)-(1-benzyl-5,5-dimethylpiperidin-3-yl)carbamate (CAS 2173193-76-3)
- 2-(3,4,5-Trifluorobenzoyl)pyridine (CAS 898758-18-4)
- (2R)-6-(3-(4-Hydroxy-2-methoxyphenyl)-1-(4-hydroxyphenyl)propyl)-2-(4-hydroxyphenyl)-8-methylchroman-7-ol (CAS 956103-75-6)
- (1-(4-Amino-2-methylphenyl)piperidin-4-yl)methanol (CAS 1094746-87-8)
- N1-benzyl-N1-isopropylpentane-1,2-diamine (CAS 1153105-25-9)
- 3-(4-Hydroxy-2-methoxy-3-(3-methylbut-2-en-1-yl)phenyl)-2H-chromen-7-ol (CAS 161099-42-9)
- 3-(tert-Butyl)-6-(trifluoromethyl)-1,2,3,4-tetrahydroquinoline (CAS 1406566-96-8)
- 2-Amino-N-(3-bromobenzyl)-N-ethylacetamide (CAS 1353984-12-9)
- Iodixanol (CAS 92339-11-2)
- [D-Glu]3-Semaglutide (CAS CATO-C4X-2226253)
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