(2E,4E,6E,8Z)-3,7-Dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4,6,8-nonatetraenenitrile 13-cis-Retinonitrile 20638-89-5 CAS 20638-89-5
| CAS No. | 20638-89-5 |
| Molecular Formula | C20H27N |
| Molecular Weight | 281.44 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 281.44 g/mol gives (2E,4E,6E,8Z)-3,7-Dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4,6,8-nonatetraenenitrile 13-cis-Retinonitrile 20638-89-5 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
(2E,4E,6E,8Z)-3,7-Dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4,6,8-nonatetraenenitrile 13-cis-Retinonitrile 20638-89-5 (CAS 20638-89-5), molecular formula C20H27N and molecular weight 281.44 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C20H27N, (2E,4E,6E,8Z)-3,7-Dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4,6,8-nonatetraenenitrile 13-cis-Retinonitrile 20638-89-5 contains a nitrogen-containing heterocyclic scaffold, a nitrile group; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 281.44 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C20H27N |
| Molecular Weight | 281.44 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 1 |
Recommended Standards
- (2E,4E,6E,8E)-3,7-Dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4,6,8-nonatetraenenitrile 20638-88-4 all-trans-Retinonitrile all-trans-Vitamin A Nitrile (CAS 20638-88-4)
- 3-Chloro-2-fluoro-6-iodobenzonitrile (CAS 1000577-68-3)
- Ropivacaine-d7 (CAS 684647-62-9)
- 2-Chloro-3-fluoro-4-iodobenzonitrile (CAS 1114547-55-5)
- Rosuvastatin Impurity 59 (CAS 404958-08-3)
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