4-Nitrophenyl α-D-galactopyranoside CAS 7493-95-0
| CAS No. | 7493-95-0 |
| Molecular Formula | C12H15NO8 |
| Molecular Weight | 301.25 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 4-Nitrophenyl α-D-galactopyranoside 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.
4-Nitrophenyl α-D-galactopyranoside (CAS 7493-95-0) is a high-purity analytical reference standard with the molecular formula C12H15NO8 and a molecular weight of 301.25 g/mol.
4-Nitrophenyl α-D-galactopyranoside (C12H15NO8) 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.
Physical & Chemical Properties
| Molecular Formula | C12H15NO8 |
| Molecular Weight | 301.25 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| 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.) | 1959 |
| Nitrogen Atoms | 1 |
Related Nitrophenyl Standards
- 4-Nitrophenyl β-D-Galactofuranoside (CAS 100645-45-2)
- 4-Nitrophenyl α-D-mannopyranoside (CAS 10357-27-4)
- 2-(2-(2-Nitrophenyl)hydrazine-1-carbonyl)benzoic acid (CAS 32669-19-5)
- 2-{[2-(4-Nitrophenyl)hydrazino]carbonyl}benzoic acid (CAS 96954-16-4)
- 2-Nitrophenyl β-D-glucopyranoside (CAS 2816-24-2)
- 3-Nitrophenyl β-D-galactopyranoside (CAS 3150-25-2)
- 3-Nitrophenyl β-D-glucopyranoside (CAS 20838-44-2)
- 4-Nitrophenyl β-D-mannopyranoside (CAS 35599-02-1)
Recommended Standards
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- 1,5,6,7-Tetrahydro-4H-azepin-4-one (CAS 34697-44-4)
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Why CATO?
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