Chloramphenicol CAS 56-75-7
| CAS No. | 56-75-7 |
| Molecular Formula | C11H12Cl2N2O5 |
| Molecular Weight | 323.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Chloramphenicol (CAS 56-75-7) is a high-purity analytical reference standard with the molecular formula C11H12Cl2N2O5 and a molecular weight of 323.13 g/mol.
Chloramphenicol (C11H12Cl2N2O5) contains a nitrogen-containing heterocyclic scaffold, an amide 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. 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).
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.
CATO manufactures Chloramphenicol under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C11H12Cl2N2O5 |
| Molecular Weight | 323.13 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | >95% |
| 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; 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.) | 1957 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chloramphenicol Standards
- m-Chloramphenicol (CAS 7411-65-6)
- Chloramphenicol-d5 (CAS 202480-68-0)
- Chloramphenicol-d5 (CAS CATO-CCAD303919)
- Chloramphenicol-13C6 (CAS 1217706-02-9)
- (±)-Chloramphenicol (CAS 2787-09-9)
- Chloramphenicol Impurity 18 (CAS 40027-72-3)
- Chloramphenicol 3-Acetate (CAS 10318-16-8)
- Chloramphenicol 1-Acetate (CAS 23214-93-9)
Recommended Standards
- N-(4-Iodophenyl)benzamide (CAS 52807-29-1)
- Methyl 3-bromo-2-(difluoromethoxy)-5-isopropylbenzoate (CAS 2404733-63-5)
- Benodanil (CAS 15310-01-7)
- L-erythro-Chloramphenicol (CAS 7384-89-6)
- 4-[2-(dimethylamino)ethoxy]-3-methoxyaniline (CAS 909728-80-9)
- Methyl 2-chloro-2,3,3-trifluoro-1-(methyl)cyclobutane carboxylate (CAS 128146-98-5)
- 2,2'-[1,6-Hexanediylbis(iminocarbonyl)]bis[benzoic acid] (CAS 7177-93-7)
- 5-Cyclopropoxypyridine-2-sulfonamide (CAS 1243463-63-9)
- (E)-3-Dimethylamino-1-[4-(6-dimethylamino-4-trifluoro-methyl-pyridin-2-yl)-phenyl]-but-2-en-1-one (CAS 1311283-92-7)
- (S)-3-amino-2-(3,4-dichlorobenzyl)propanoic acid (CAS 1260593-28-9)
- 6-Bromo-2-chloroquinazolin-4(1H)-one (CAS 167158-70-5)
- 3-(2-Oxo-3-(p-tolyl)imidazolidin-1-yl)benzoic acid (CAS 651748-89-9)
- [1,2,4]Triazolo[1,5-a]pyrazin-2-ylmethanol (CAS 1823925-32-1)
- Semaglutide impurity 100 (CAS CATO-C4X-2226100)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com