5-(2-Chloro-5-nitrobenzenesulfonamido)-2-hydroxybenzoic acid CAS 328028-30-4
| CAS No. | 328028-30-4 |
| Molecular Formula | C13H9ClN2O7S |
| Molecular Weight | 372.74 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 5-(2-Chloro-5-nitrobenzenesulfonamido)-2-hydroxybenzoic 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.
CATO supplies 5-(2-Chloro-5-nitrobenzenesulfonamido)-2-hydroxybenzoic acid (CAS 328028-30-4), a certified reference material (molecular formula C13H9ClN2O7S, MW 372.74 g/mol) for analytical method development and quality control.
5-(2-Chloro-5-nitrobenzenesulfonamido)-2-hydroxybenzoic acid (C13H9ClN2O7S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
Physical & Chemical Properties
| Molecular Formula | C13H9ClN2O7S |
| Molecular Weight | 372.74 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Chloro Standards
- 4-((4-Chloro-3-nitrophenyl)sulfonamido)-2-hydroxybenzoic acid (CAS 328028-09-7)
- 5-(4-Chloro-3-nitro-benzenesulfonylamino)-2-hydroxy-benzoic acid (CAS 325732-20-5)
- N-[[(5-Chloro-2-Hydroxyphenyl)-Phenylmethyl]Carbamoyl]-2,2,2-Trifluoroacetamide (CAS 160776-86-3)
- Methyl 2-{[3-chloro-5-(trifluoromethyl)pyridin-2-yl]sulfonyl}-3-(dimethylamino)prop-2-enoate (CAS 1823194-70-2)
- (Z)-{[3-chloro-5-(trifluoromethyl)pyridin-2-yl]({[(pyridin-3-yl)methyl]amino})methylidene}amino acetate (CAS 320420-59-5)
- 2-((1-(3-Chloro-5-(trifluoromethyl)pyridin-2-yl)-1H-indol-3-yl)methylene)malononitrile (CAS 338409-96-4)
- 2-{[2-Chloro-5-(trifluoromethyl)phenyl]amino}-2-oxoethyl 4-aminobenzoate (CAS 931259-26-6)
- 4-[5-({[3-chloro-5-(trifluoromethyl)pyridin-2-yl]amino}methyl)-4,5-dihydro-1,2-oxazol-3-yl]pyrimidin-2-amine (CAS 344277-07-2)
Recommended Standards
- N-(benzo[d][1,3]dioxol-5-ylmethyl)-2-(3-chloro-5-(trifluoromethyl)pyridin-2-yl)acetamide (CAS 478063-69-3)
- Nonamethylcyclopentasiloxan-2-ol DISCONTINUED (CAS 5290-04-0)
- 1,1,1,5,5,5-Hexamethyl-3-phenyl-3-(trimethylsilyloxy)trisiloxane (CAS 2116-84-9)
- 2-(4-Chlorophenoxy)-N'-[(1E)-[4-(trifluoromethoxy)phenyl]methylidene]acetohydrazide (CAS 868630-56-2)
- Ethyl N-[1-(morpholin-4-yl)-2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-carbonyl]carbamate (CAS 320420-07-3)
- 2-(2-((1-(Pyridin-3-yl)ethyl)amino)ethoxy)ethan-1-ol (CAS 1042540-77-1)
- (2-Aminopyridin-4-yl)dimethylphosphine oxide (CAS 2361977-47-9)
- 5-{5-(benzylthio)-4-[3-(trifluoromethyl)phenyl]-4H-1,2,4-triazol-3-yl}-2-chloropyridine (CAS 680216-97-1)
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- 6-(4-Methyl-1,4-diazepan-1-yl)pyridazine-3-carboxylic acid (CAS 1183765-68-5)
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