Guaiazulene Impurity 7 CAS 65757-01-9
| CAS No. | 65757-01-9 |
| Molecular Formula | C15H17O4S |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Guaiazulene Impurity 7 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.
Guaiazulene Impurity 7 (CAS 65757-01-9) is a certified pharmaceutical impurity reference standard with the molecular formula C15H17O4SNa and a molecular weight of 316.35 g/mol.
Guaiazulene Impurity 7 (C15H17O4SNa) contains a flavonoid core, a sulfone group, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility, 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 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 | C15H17O4S Na |
| Molecular Weight | 316.35 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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) | 7.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1975 |
| Sulfur Atoms | 1 |
Related Guaiazulene Standards
- Guaiazulene Impurity 3 (CAS 111631-17-5)
- Guaiazulene impurity 11 (CAS 24687-70-5)
- Methyl guaiazulene-3-carboxylate (CAS 39665-58-2)
- Guaiazulene (CAS 489-84-9)
- Guaiazulene Impurity 6 (CAS 93914-28-4)
- Guaiazulene Impurity 1 (CAS CATO-C4X-22371)
- Guaiazulene Impurity 10 (CAS CATO-C4X-223710)
- Guaiazulene Impurity 2 (CAS CATO-C4X-22372)
Recommended Standards
- Rivaroxaban Impurity 163 (CAS 2422046-61-3)
- Linezolid Impurity 117 (CAS 352665-38-4)
- Ceritinib Impurity 63 (CAS CATO-C4X-104863)
- (3,5-Dimethoxy-benzyl)-(4-methoxy-benzyl)-amineoxalate (CAS 1185302-95-7)
- {2-[3,4-Dihydro-1(2H)-quinolinyl]-3-pyridinyl}methanamine (CAS 953884-19-0)
- 2-(4-(tert-Butoxycarbonyl)-3-methylpiperazin-1-yl)acetic acid (CAS 1060813-50-4)
- H-Leu-Leu-OMe · HBr (CAS 16689-14-8)
- N-(cyclohexylmethyl)-2-morpholinoethan-1-amine (CAS 775568-93-9)
- 3-((3-Fluorophenoxy)methyl)azetidine (CAS 1332301-01-5)
- [2-31]-Semaglutide C (x TFA Salt) (CAS CATO-C4X-2226118)
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