2-Nitro-4-sulfobenzoic acid CAS 552-23-8
| CAS No. | 552-23-8 |
| Molecular Formula | C7H5NO7S |
| Molecular Weight | 247.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 2-Nitro-4-sulfobenzoic acid (C7H5NO7S) contains a carbohydrate-derived structure, an amide group, a sulfone group. 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 247.18 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.
CATO supplies 2-Nitro-4-sulfobenzoic acid (CAS 552-23-8), a certified reference material (molecular formula C7H5NO7S, MW 247.18 g/mol) for analytical method development and quality control.
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 | C7H5NO7S |
| Molecular Weight | 247.18 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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 |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Nitro Standards
- 4-Nitro-2-sulfobenzoic acid (CAS 22952-26-7)
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- 3-[(3-nitro-1h-pyrazol-1-yl)methoxy]benzaldehyde (CAS 1006435-82-0)
- 3-((4-Nitro-1h-pyrazol-1-yl)methoxy)benzaldehyde (CAS 1006436-08-3)
- 4-((3-Nitro-1h-pyrazol-1-yl)methoxy)benzaldehyde (CAS 1006953-42-9)
- 4-[(4-nitro-1H-pyrazol-1-yl)methoxy]benzaldehyde (CAS 1006953-87-2)
- 1-(7-Nitro-2,3-dihydro-1,4-benzodioxin-6-yl)-1H-imidazole (CAS 1020242-98-1)
- 1-(4-Nitro-benzyl)-1H-pyrazole-4-carboxylic acid (CAS 1153368-80-9)
Recommended Standards
- 2-((3-(Trifluoromethyl)-[1,2,4]triazolo[4,3-b]pyridazin-6-yl)amino)ethan-1-ol (CAS 309741-26-2)
- 2-((2R,3S,4R,5R)-3-Fluoro-4-hydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-1,2,4-triazine-3,5(2H,4H)-dione (CAS 908129-24-8)
- 6-bromo-3-methyl-quinolin-2-amine (CAS 203506-01-8)
- 1-Bromo-3-fluoro-2-(trimethylsilyl)benzene (CAS 632324-41-5)
- 1-Acetyl-5-(heptafluoropropyl)-3-methyl-1H-pyrazole (CAS 1017793-57-5)
- N-(1-benzylpiperidin-4-yl)-4-(tert-butyl)benzamide (CAS 334974-41-3)
- N-((1-(2-Aminoethyl)pyrrolidin-2-yl)methyl)acetamide (CAS 1353958-03-8)
- 4-(4-Methyl-1h-pyrazol-1-yl)-2-(methylamino)butanamide (CAS 1341446-12-5)
- Bis(3-(trifluoromethyl)phenyl)phosphine oxide (CAS 15929-44-9)
- tert-Butyl 3-(3-bromopropyl)piperidine-1-carboxylate (CAS 193629-30-0)
- 2-((4-Chlorophenyl)sulfonyl)-2-(pyridin-3-yl)ethan-1-amine dihydrochloride (CAS 1094395-61-5)
- 2-(3-Chloro-4-methoxyphenyl)pyrrolidine hydrochloride (CAS 1177352-21-4)
- 5-(Chloromethyl)-2-[4-(propan-2-yl)phenyl]-1,3-thiazole (CAS 749906-94-3)
- Semaglutide impurity 32 (CAS CATO-C4X-222632)
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