Vitamin A impurity 5(Mixture of E/Z Isomers) CAS CATO-C4X-25505-SS
| CAS No. | CATO-C4X-25505-SS |
| Molecular Formula | C20H28 |
| Molecular Weight | 268.44 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 268.44 g/mol gives Vitamin A impurity 5(Mixture of E/Z Isomers) distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies Vitamin A impurity 5(Mixture of E/Z Isomers) (CAS CATO-C4X-25505-SS), a pharmacopoeial impurity reference standard (molecular formula C20H28, MW 268.44 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a polycyclic aromatic system, Vitamin A impurity 5(Mixture of E/Z Isomers) is typically off-white to pale yellow low-melting solid. Its solid-state physicochemical attributes — including a molecular weight of 268.44 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 5(Mixture of E/Z Isomers) 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 | C20H28 |
| Molecular Weight | 268.44 g/mol |
| Purity | 10.0mg/mL in n-Hexane |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Vitamin Standards
- Vitamin A Impurity B(Mixture of E/Z Isomers) (CAS CATO-C1305354)
- Vitamin A Impurity 24 (CAS 1224-78-8)
- Vitamin A Impurity 28 (CAS CATO-C4X-218728)
- Vitamin K1 Impurity 49 (CAS 3689-69-8)
- Vitamin K2 Impurity 13 (CAS 587888-42-4)
- Vitamin K1 Impurity 41 (CAS 1778736-16-5)
- Vitamin K1 Impurity 42 (CAS 326475-12-1)
- Vitamin K1 Impurity 59 (CAS CATO-C4X-220759)
Recommended Standards
- Pitolisant impurity 22 (CAS 110129-10-7)
- 3-Fluorophenethylzinc bromide (CAS 1142275-36-2)
- 2-(6-Chloropyridin-3-yl)-6-methyl-1,3,6,2-dioxazaborocane-4,8-dione (CAS 1257642-71-9)
- 1330185-38-0 Tetraethylcystamine-13C4 (CAS 1330185-38-0)
- Bilirubin impurity 4 (CAS CATO-C4X-15614)
- Dapagliflozin Impurity 143 (CAS CATO-C4X-1138143)
- Hydrochlorothiazide Impurity 35 (CAS CATO-C4X-117735)
- 2-Ethyl-1-methyl-5-nitro-1H-indazol-3(2H)-one (CAS 637338-30-8)
- 4-Bromo-1-(2-methoxyphenyl)pyridin-2(1h)-one (CAS 1822826-89-0)
- N-Butyl-2-chloro-N-(4-methyloxazol-2-yl)benzamide (CAS 57067-84-2)
- n-Ethyl-4-(methylthio)-3-nitrobenzamide (CAS 923249-69-8)
- 2-(2,2-Dimethyl-3,4-dihydro-2H-chromen-7-yl)-acetohydrazide (CAS 1291486-05-9)
- Bicyclo[2.2.1]hepta-1,3-diene,2-diphenylphosphanylethyl(diphenyl)phosphane,rhodium(3+),tetrafluoroborate (CAS 60430-43-5)
- Peptide Impurity 34 (CAS 21282-09-7)
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