trans-Heptachlor Epoxide Isomer A CAS 28044-83-9
| CAS No. | 28044-83-9 |
| Molecular Formula | C10H5Cl7O |
| Molecular Weight | 389.32 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, trans-Heptachlor Epoxide Isomer A is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 389.32 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
trans-Heptachlor Epoxide Isomer A (CAS 28044-83-9), molecular formula C10H5Cl7O and molecular weight 389.32 g/mol, is a CATO reference standard with documented purity and traceability.
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.
As a certified reference material (CRM), trans-Heptachlor Epoxide Isomer A 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.
Physical & Chemical Properties
| Molecular Formula | C10H5Cl7O |
| Molecular Weight | 389.32 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | >95% |
| Storage | Store at room temperature |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1965 |
| Halogen Content | Cl-containing |
Related trans Standards
Recommended Standards
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- Sitagliptin EP Impurity B (CAS 486460-31-5)
- (R)-Ostarine (CAS 1132656-73-5)
- Sitagliptin EP Impurity C (CAS 945261-48-3)
- 2,6-Dimethoxy-3-(methylsulfanyl)pyridine (CAS 1826110-21-7)
- Ethyl 8-ethyl-4-(methylamino)quinoline-3-carboxylate (CAS 1282469-57-1)
- 1-(Thiazol-2-yl)propan-1-one (CAS 43039-98-1)
- (4,5-Dichloro-6-oxopyridazin-1(6H)-yl)methyl 2-chloro-6-fluorobenzoate (CAS 298188-08-6)
- 1-(Benzyloxy)-4-(3-bromopropyl)benzene (CAS 167091-73-8)
- (R)-2-[(Cbz-amino)methyl]-3-methylbutanoic Acid (CAS 1138323-75-7)
- 2-Chloro-n-[(3-chlorophenyl)(phenyl)methyl]acetamide (CAS 1311314-64-3)
- 5-Amino-4-methylnicotinic acid (CAS 890092-44-1)
- (R)-4,4-dimethylpyrrolidin-3-ol (CAS 1152367-83-3)
- Semaglutide impurity 275 (CAS CATO-C4X-2226275)
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