3-Amino-5-chloro-4-hydroxybenzenesulfonic acid CAS 5857-94-3
| CAS No. | 5857-94-3 |
| Molecular Formula | C6H6ClNO4S |
| Molecular Weight | 223.63 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 223.63 g/mol gives 3-Amino-5-chloro-4-hydroxybenzenesulfonic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
3-Amino-5-chloro-4-hydroxybenzenesulfonic acid (CAS 5857-94-3) is a high-purity analytical reference standard with the molecular formula C6H6ClNO4S and a molecular weight of 223.63 g/mol.
Based on its molecular formula C6H6ClNO4S, 3-Amino-5-chloro-4-hydroxybenzenesulfonic acid contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 223.63 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 3-Amino-5-chloro-4-hydroxybenzenesulfonic 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 | C6H6ClNO4S |
| Molecular Weight | 223.63 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Amino Standards
- 3-Amino-5-chloro-2-hydroxybenzenesulfonic acid (CAS 88-23-3)
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Recommended Standards
- 4-(3-Chloro-2-fluorophenyl)pyrimidin-2-amine (CAS 671754-13-5)
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- 4-Chloro-5-(2-fluorophenyl)-1H-pyrrole-3-carbaldehyde (CAS 928324-56-5)
- 2-Chloro-N-(3-fluorophenyl)pyrimidin-4-amine (CAS 898805-58-8)
- 2,5-Dimethyl-3-phenylpyrazolo[1,5-a]pyrimidine (CAS 1781423-38-8)
- 2,4,6-Trimethylphenylmagnesium bromide 2-Mesitylmagnesium bromide solution 2633-66-1 (CAS 2633-66-1)
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- 2-(4-Chlorophenyl)-1-[(4-chlorophenyl)methoxy]-6-nitro-1H-1,3-benzodiazole (CAS 282523-42-6)
- Methyl 2-[bis(tertbutoxycarbonyl)-amino]thiazole-5-carboxylate (CAS 1311278-00-8)
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