(S)-2-Hydroxy-3-(4-nitrophenyl)propanoic acid CAS 33173-27-2
| CAS No. | 33173-27-2 |
| Molecular Formula | C9H9NO5 |
| Molecular Weight | 211.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 211.17 g/mol gives (S)-2-Hydroxy-3-(4-nitrophenyl)propanoic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
(S)-2-Hydroxy-3-(4-nitrophenyl)propanoic acid (CAS 33173-27-2), molecular formula C9H9NO5 and molecular weight 211.17 g/mol, is a CATO reference standard with documented purity and traceability.
(S)-2-Hydroxy-3-(4-nitrophenyl)propanoic acid (C9H9NO5) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C9H9NO5 |
| Molecular Weight | 211.17 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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 |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Nitrogen Atoms | 1 |
Related S Standards
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- Methyl 3-hydroxy-2-methyl-4-nitrobenzoate (CAS 1031359-53-1)
- Ethyl 4-hydroxy-2-nitrobenzoate (CAS 104356-27-6)
- Methyl 4-Hydroxy-2-methyl-5-nitrobenzoate (CAS 1163281-04-6)
- 3-Hydroxy-4-[(methoxycarbonyl)amino]benzoic acid (CAS 1183828-26-3)
- 2-Hydroxy-3,4-dimethyl-5-nitrobenzoic acid (CAS 1245529-08-1)
- Methyl 3-hydroxy-4-methyl-5-nitrobenzoate, 97% (CAS 125229-13-2)
- 1-(4-Hydroxy-3-methoxy-2-nitrophenyl)ethan-1-one (CAS 1260785-45-2)
Recommended Standards
- (R)-2-Hydroxy-3-(4-nitrophenyl)propanoic acid (CAS 68671-47-6)
- (S)-4C3HPG (CAS 85148-82-9)
- (7-nitro-2,3-dihydro-1,4-benzodioxin-2-yl)methanol (CAS 59987-31-4)
- (Z)-N'-hydroxy-2-(4-nitrophenoxy)acetimidamide (CAS 874781-99-4)
- (4-Chlorobutoxy)cyclohexane (CAS 105571-01-5)
- 3-(N-(2-(2-Chloro-4-nitrophenoxy)ethyl)sulfamoyl)benzene-1-sulfonyl fluoride (CAS 25240-50-0)
- 2-Bromo-3-chloro-6-methyl-5-nitropyridine (CAS 1806051-06-8)
- 2-Oxo-2-((1-phenylethyl)amino)ethyl 3-methylthiophene-2-carboxylate (CAS 479030-74-5)
- 3-(Quinolin-3-ylmethyl)quinazolin-4(3H)-one (CAS 923018-92-2)
- 5-Propargylamino-dCTP (CAS 115899-39-3)
- 2-(5-bromo-2-ethoxy-4-formylphenoxy)-N-phenylacetamide (CAS 832674-58-5)
- (Z)-Dimethylvinphos (CAS 67628-93-7)
- 1783417-32-2 5-(Aminomethyl)-2-methylpyridazin-3(2H)-one (CAS 1783417-32-2)
- Exenatide (CAS 141758-74-9（free base）)
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