Promethazine Impurity 30 CAS 3568-81-8
| CAS No. | 3568-81-8 |
| Molecular Formula | C12H7NO2S |
| Molecular Weight | 229.25 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
Promethazine Impurity 30 (CAS 3568-81-8) is a high-purity analytical reference standard with the molecular formula C12H7NO2S and a molecular weight of 229.25 g/mol.
Structurally, Promethazine Impurity 30 (C12H7NO2S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 229.25 g/mol, it falls into the medium-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C12H7NO2S |
| Molecular Weight | 229.25 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Promethazine Standards
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- Promethazine Impurity 27 (CAS 1209-66-1)
- Promethazine Impurity 29 (CAS 20962-92-9)
- Promethazine Impurity 7 (CAS 15375-48-1)
- Promethazine impurity 58 (CAS CATO-C4X-141858)
- Promethazine Impurity 53 (CAS CATO-C4X-141853)
- Promethazine Impurity 39 (CAS 857523-80-9)
Recommended Standards
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- 2-(3-Isobutoxyphenyl)-6,8-dimethylquinoline-4-carbonyl chloride (CAS 1160262-98-5)
- (R)-2-Amino-3-methyl-N-(1,3,4-thiadiazol-2-yl)butanamide (CAS 90581-83-2)
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- Autocamtide-2-Related Inhibitory Peptide TFA (CAS 167114-91-2（free base）)
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