3-Amino-5-chloro-2-hydroxybenzenesulfonic acid CAS 88-23-3
| CAS No. | 88-23-3 |
| Molecular Formula | C6H6ClNO4S |
| Molecular Weight | 223.63 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO supplies 3-Amino-5-chloro-2-hydroxybenzenesulfonic acid (CAS 88-23-3), a certified reference material (molecular formula C6H6ClNO4S, MW 223.63 g/mol) for analytical method development and quality control.
Structurally, 3-Amino-5-chloro-2-hydroxybenzenesulfonic acid (C6H6ClNO4S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 223.63 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 | 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.) | 1957 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Amino Standards
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Recommended Standards
- 2-Chloro-N-(4-fluorophenyl)pyrimidin-4-amine (CAS 260046-12-6)
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- 2-Chloro-5-fluoro-N-phenylpyrimidin-4(3H)-imine (CAS 280581-64-8)
- 3-Fluoro-2-(methoxycarbonyl)benzeneboronic acid pinacol ester, 97% (CAS 1293284-61-3)
- 2-Chloro-3-(2-fluorophenyl)-5-(trifluoromethyl)pyridine (CAS 1214334-02-7)
- 4-nitro-1H-indole-3-carbaldehyde (CAS 10553-11-4)
- 893-33-4 AR-1I2308 chromium(3+) sodium[(3-chloro-5-{[1-(2,6-dimethyl-3-sulfamoylphenyl)-3-methyl-5-oxo-1,5-dihydro-4h-pyrazol-4-ylidene]hydrazinylidene}-6-oxocyclohexa-1,3-dien-1-yl)imino]dioxidanide 4-[(3-chloro-5-nitro-6-oxocyclohexa-2,4-dien-1-ylidene)diazanidyl]-1-(2,6-dimethyl-3-sulfamoylphenyl)-3-methyl-1h-pyrazol-5-olate(1:1:1:1) (CAS 893-33-4)
- 5-Methoxy-2-nitro-4-phenoxybenzaldehyde (CAS 1799439-10-3)
- 2,5-Dibromo-3-tetradecylthiophene (CAS 160096-74-2)
- tert-Butyl (5-chloro-6-methylpyridin-2-yl)carbamate (CAS 582308-82-5)
- 7-(1h-Indol-3-yl)heptanoic acid (CAS 26020-37-1)
- 3-(5-fluoropyridin-3-yl)prop-2-enoic acid (CAS 27678-14-4)
- Semaglutide impurity 94 (CAS CATO-C4X-222694)
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