4-Amino-2-sulfotoluene CAS 118-88-7
| CAS No. | 118-88-7 |
| Molecular Formula | C7H9NO3S |
| Molecular Weight | 187.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 187.22 g/mol gives 4-Amino-2-sulfotoluene distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 4-Amino-2-sulfotoluene (CAS 118-88-7), a certified reference material (molecular formula C7H9NO3S, MW 187.22 g/mol) for analytical method development and quality control.
Based on its molecular formula C7H9NO3S, 4-Amino-2-sulfotoluene contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 187.22 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.
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 | C7H9NO3S |
| Molecular Weight | 187.22 g/mol |
| Purity | >95% |
| 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) | 4.0 |
| 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
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- Ethyl 2-Bromo-5-nitrobenzoate (CAS 208176-31-2)
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