Benzyl Alcohol Impurity 9 CAS 581-55-5
| CAS No. | 581-55-5 |
| Molecular Formula | C11H12O4 |
| Molecular Weight | 208.21 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Benzyl Alcohol Impurity 9 (CAS 581-55-5) is a certified pharmaceutical impurity reference standard with the molecular formula C11H12O4 and a molecular weight of 208.21 g/mol.
Based on its molecular formula C11H12O4, Benzyl Alcohol Impurity 9 contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 208.21 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
As a certified reference material (CRM), Benzyl Alcohol Impurity 9 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 | C11H12O4 |
| Molecular Weight | 208.21 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| 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 |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Benzyl Standards
- Benzyl Alcohol Impurity 14 (CAS 19800-47-6)
- Benzyl Alcohol Impurity I (CAS 1586-00-1)
- Benzyl Alcohol Impurity 4 (CAS 122-63-4)
- Benzyl Alcohol Impurity 11 (CAS 1024-41-5)
- 29654-55-5 Benzyl alcohol, 3,5-dihydroxy- 5-(Hydroxymethyl)resorcinol 3-06-00-06326 (Beilstein Handbook Reference) BRN 2326351 3,5-Dihydroxybenzyl alcohol EINECS 249-751-8 (CAS 29654-55-5)
- Benzyl Alcohol Impurity 10 (CAS 539-30-0)
- 54522-91-7 Benzyl alcohol-|A-13C DTXSID00480287 (CAS 54522-91-7)
- Benzyl Alcohol EP Impurity B (CAS 100-49-2)
Recommended Standards
- Salbutamol Impurity 77 (CAS 39235-57-9)
- Cefaclor Degradation A Impurity(H-D-Phg-Gly-OH) (CAS 6453-64-1)
- Salbutamol Impurity 194 (CAS CATO-C4X-1176194)
- H-L-Phg-Gly-OH (CAS 134624-91-2)
- Etizolam Impurity 11 (CAS CATO-C4X-350911)
- Roflumilast impurity 25 (CAS 1243391-44-7)
- Arginine impurity 13 (CAS CATO-C4X-242413)
- 3-Aminopyridin-4(1H)-one hydrochloride (CAS 120256-13-5)
- 5-[(methylsulfanyl)methyl]furan-2-carbaldehyde (CAS 1118786-97-2)
- 5-Bromo-2,4,6-trimethylnicotinonitrile (CAS 531521-32-1)
- 6-Chloro-2,3-difluoro-4-(trifluoromethyl)aniline (CAS 914635-28-2)
- Benzo[d][1,2,3]thiadiazol-5-ol (CAS 7686-40-0)
- 34893-92-0 Benzene, 1,3-dichloro-5-isocyanato- 1,3-Dichloro-5-isocyanatobenzene 3,5-Dichlorophenyl isocyanate EINECS 252-276-9 EC 252-276-9 (CAS 34893-92-0)
- Calcineurin Autoinhibitory Peptide (CAS 148067-21-4)
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