3-Amino-4-chlorobenzenesulfonic acid CAS 98-36-2
| CAS No. | 98-36-2 |
| Molecular Formula | C6H6ClNO3S |
| Molecular Weight | 207.63 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-Amino-4-chlorobenzenesulfonic acid (CAS 98-36-2), molecular formula C6H6ClNO3S and molecular weight 207.63 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, 3-Amino-4-chlorobenzenesulfonic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 207.63 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
As a certified reference material (CRM), 3-Amino-4-chlorobenzenesulfonic 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 | C6H6ClNO3S |
| Molecular Weight | 207.63 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
- 3-Amino-5-chlorobenzenesulfonic acid (CAS 98-21-5)
- 4-Amino-3-chlorobenzenesulfonic acid (CAS 98-35-1)
- 6-Amino-5-chloropyridine-3-sulfonamide (CAS 1269152-45-5)
- 4-Amino-5-chloropyridine-3-sulfonamide (CAS 1352496-64-0)
- 2-Amino-5-chloropyridine-3-sulfonamide (CAS 163137-44-8)
- (s)-2-Amino-2-(2-chloro-3,6-difluorophenyl)ethan-1-ol (CAS 1212946-05-8)
- (r)-2-Amino-2-(4-chloro-2,5-difluorophenyl)ethan-1-ol (CAS 1212955-77-5)
- (r)-2-Amino-2-(3-chloro-2,4-difluorophenyl)ethan-1-ol (CAS 1213080-88-6)
Recommended Standards
- 2-Methoxy-3-pyridinesulfonyl Chloride (CAS 219715-44-3)
- 2-chloro-5-hydroxybenzene-1-sulfonamide (CAS 86093-06-3)
- 3-Chloro-2-(2-fluorophenyl)pyridine (CAS 387827-67-0)
- 2-Chloro-4-hydroxybenzenesulfonamide (CAS 23202-61-1)
- 4-Aminotetrahydropyran-4-carboxylic Acid (CAS 39124-20-4)
- For-Ala-OMe (CAS 32221-83-3)
- (S)-3-Amino-3-(3,5-dimethoxyphenyl)propanoic acid (CAS 792183-19-8)
- Dimethyl N,N-Diisopropylphosphoramidite (CAS 29952-64-5)
- DPP48-Br (CAS 1454609-37-0)
- piperidin-2-ylmethyl N-cyclohexylcarbamate hydrochloride (CAS 1803588-41-1)
- 4-Morpholinocyclohexane-1-carboxylic acid (CAS 877662-56-1)
- Parecoxib Impurity 41 (CAS 198470-82-5)
- N-[[3,5-Bis(trifluoromethyl)phenyl]methyl]-N'-[(8α,9S)-6'-methoxycinchonan-9-yl]thiourea (CAS 1623075-49-9)
- Peptide Impurity 26 (CAS 1350456-66-4)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com