Clenbuterol EP impurity E CAS 37148-47-3
| CAS No. | 37148-47-3 |
| Molecular Formula | C8H6BrCl2NO |
| Molecular Weight | 282.95 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Clenbuterol EP impurity E 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.
CATO supplies Clenbuterol EP impurity E (CAS 37148-47-3), a pharmacopoeial impurity reference standard (molecular formula C8H6BrCl2NO, MW 282.95 g/mol) used for the identification and quantification of trace impurities in APIs.
Clenbuterol EP impurity E (C8H6BrCl2NO) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine/bromine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
Physical & Chemical Properties
| Molecular Formula | C8H6BrCl2NO |
| Molecular Weight | 282.95 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1967 |
| Halogen Content | Cl/Br-containing |
| Nitrogen Atoms | 1 |
Related Clenbuterol Standards
- Clenbuterol-d9 (CAS 129138-58-5)
- (R)-(-)-Clenbuterol (CAS 50306-03-1)
- (S)-(+)-Clenbuterol (CAS 50499-60-0)
- Clenbuterol Impurity 15 (CAS 38339-14-9)
- (±)-Clenbuterol (CAS 37148-27-9)
- Clenbuterol EP Impurity B (CAS 69708-36-7)
- Clenbuterol Impurity 22 (CAS CATO-C4X-199322)
- Clenbuterol-Hydroxymethyl (CAS 38339-18-3)
Recommended Standards
- N-(4-bromo-3-chlorophenyl)-2-chloroacetamide (CAS 22521-43-3)
- 2-(4,5-Dibromofuran-2-yl)-N-methylethan-1-amine (CAS 1344257-16-4)
- 2-Bromo-N-(3,5-dichlorophenyl)acetamide (CAS 57339-11-4)
- 3,4-Dibromo-1-isopropyl-1H-pyrrol-2(5H)-one (CAS 1706429-01-7)
- Fluralaner Impurity 11 (CAS CATO-C4X-218011)
- Rebamipide impurity 01 (CAS 4900-38-3)
- Fesoterodine Impurity 15 (CAS CATO-C4X-164415)
- (4,4,9,9-Tetrabutyl-4,9-dihydro-s-indaceno[1,2-b:5,6-b']dithiophene-2,7-diyl)bis(trimethylstannane) (CAS 2247824-99-1)
- 2-(2-Chlorophenyl)thiophene (CAS 893736-04-4)
- 6-(Benzylthio)hexan-2-one (CAS 189103-47-7)
- 1-(difluoromethyl)-4-nitro-1H-indole (CAS 1774830-17-9)
- 4-(2-Hydrazinylthiazol-4-yl)phenol (CAS 139420-55-6)
- (4-Chloro-3-methylphenyl)(3-chlorophenyl)methanone (CAS 951891-08-0)
- [Plus-β-Ala28]-Semaglutide (CAS CATO-C4X-2226221)
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