4-Chloro-3-(methylsulfonyl)-5-nitrobenzoic acid CAS 32548-10-0
| CAS No. | 32548-10-0 |
| Molecular Formula | C8H6ClNO6S |
| Molecular Weight | 279.65 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Chloro-3-(methylsulfonyl)-5-nitrobenzoic acid (CAS 32548-10-0), molecular formula C8H6ClNO6S and molecular weight 279.65 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 4-Chloro-3-(methylsulfonyl)-5-nitrobenzoic acid (C8H6ClNO6S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 279.65 g/mol, it falls into the medium-molecular-weight range. 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 | C8H6ClNO6S |
| Molecular Weight | 279.65 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 |
| 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Chloro Standards
- (Z)-3-Chloro-N'-hydroxy-N-(prop-2-en-1-yl)-5-(trifluoromethyl)pyridine-2-carboximidamide (CAS 1273562-44-9)
- (4-Chloro-3-nitrophenyl)(4-fluorophenyl)methanone (CAS 31431-16-0)
- 2-Chloro-5-(methylsulfonyl)-3-nitrobenzoic acid (CAS 2183910-38-3)
- 3-Chloro-N-((dimethylamino)methylene)-5-(trifluoromethyl)picolinamide (CAS 338759-19-6)
- 4-(3-Chloro-5-(trifluoromethyl)pyridin-2-yl)piperazin-2-one (CAS 923143-11-7)
- N'-(3-chloro-5-(trifluoromethyl)pyridin-2-yl)-N'-methylacrylohydrazide (CAS 338965-00-7)
- Sodium 4-(4-chloro-2-hydroxybenzamido)butanoate (CAS 387825-07-2)
- 2-[3-chloro-5-methoxy-4-(2,2,2-trifluoroethoxy)phenyl]acetonitrile (CAS 1209937-54-1)
Recommended Standards
- 7-Nitro-2,3-dihydro-1,4-benzodioxine-6-sulfonyl chloride (CAS 5279-54-9)
- Methyl 5-(chlorosulfonyl)-2-nitrobenzoate (CAS 2089314-98-5)
- 3-(chlorosulfonyl)-4-methyl-5-nitrobenzoic acid (CAS 52317-26-7)
- (4-Chlorophenyl)(4-fluoro-3-nitrophenyl)methanone (CAS 956474-49-0)
- (4-((2,2,2-Trifluoroethyl)amino)piperidin-4-yl)methanol (CAS 1250239-34-9)
- 3-(4-Bromo-2-fluorophenyl)-2-cyanopropionic Acid (CAS 2044707-14-2)
- 2-(3-Methoxypyridin-2-yl)-2-methylpropanoic acid (CAS 1439902-52-9)
- 4-[(Allyloxy)methyl]-2,2-dimethyl-1,3-dioxolane (CAS 4421-23-2)
- 1-(2-Morpholinoethyl)cyclopentane-1-carboxylic acid (CAS 220878-10-4)
- 2-Methyl-3-[(propan-2-yloxy)methyl]aniline (CAS 1157090-24-8)
- N'-(6-Fluoropyridin-2-yl)-4-methoxybenzohydrazide (CAS 338780-90-8)
- 6,9-Dihydroxybenzo[g]isoquinoline-5,10-dione (CAS 4589-37-1)
- Ethyl 5-Bromo-2,2-dimethyl-4-oxopentanoate (CAS 154325-75-4)
- Semaglutide impurity 258 (CAS CATO-C4X-2226258)
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