Vitamin A Impurity 19 CAS 29443-87-6
| CAS No. | 29443-87-6 |
| Molecular Formula | C22H32O2 |
| Molecular Weight | 328.49 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Vitamin A Impurity 19 is closely related to a steroid core, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
As a process- or degradation-related impurity, Vitamin A Impurity 19 (CAS 29443-87-6, C22H32O2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Vitamin A Impurity 19 (C22H32O2) contains a steroid core, 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 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.
CATO manufactures Vitamin A Impurity 19 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.
Physical & Chemical Properties
| Molecular Formula | C22H32O2 |
| Molecular Weight | 328.49 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1965 |
Related Vitamin Standards
- Vitamin A Impurity 16 (CAS CATO-C4X-218716)
- Vitamin A Acetate (CAS 127-47-9)
- Vitamin K1 Impurity 21 (CAS 562836-92-4)
- Vitamin K1 Impurity 54 (CAS CATO-C4X-220754)
- Vitamin A-d5 Acetate (CAS 1217219-62-9)
- Vitamin K1 Impurity 19 (CAS 2580987-82-0)
- Vitamin K1 Impurity 20 (CAS CATO-C4X-220720)
- Vitamin K1 Impurity 60 (CAS 2580987-83-1)
Recommended Standards
- Prostene diastereomers (CAS CATO-C4X-220510)
- 13-cis Retinol Acetate (CAS 34356-31-5)
- Promestriene Impurity 15 (CAS CATO-C4X-220515)
- Retinoic Acid Related Compound 22 (CAS 29444-27-7)
- Moxifloxacin Impurity 55 (CAS 53764-99-1)
- Luliconazole impurity 23 (CAS CATO-C4X-285323)
- Tizanidine Impurity 45 (CAS CATO-C4X-144545)
- N-[(R)-6-Carboxy-N2-[N-(1-oxoheptyl)-D-γ-glutamyl]-L-lysyl]-D-alanine (CAS 79335-75-4)
- 1-(2-Aminoethyl)-4-methylcycloheptan-1-ol (CAS 1542087-39-7)
- (3S,5S)-3,5-Diaminohexanoic acid (CAS 34281-55-5)
- 1-(3,3,3-trifluoropropyl)piperidin-4-amine,2HCl (CAS 1431965-96-6)
- 2-Allyl-2H-benzo[d][1,2,3]triazole (CAS 82813-00-1)
- 4-Bromo-6-hydroxynicotinaldehyde (CAS 1289159-69-8)
- Tirzepatide Impurity 61 (CAS CATO-C4X-324061)
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