(1S,4aR,5S,8aR)-5-((R)-3-Hydroxy-3-methylpent-4-en-1-yl)-1,4a-dimethyl-6-methylenedecahydronaphthalene-1-carboxylic acid CAS 1909-90-6
| CAS No. | 1909-90-6 |
| Molecular Formula | C20H32O3 |
| Molecular Weight | 320.47 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
(1S,4aR,5S,8aR)-5-((R)-3-Hydroxy-3-methylpent-4-en-1-yl)-1,4a-dimethyl-6-methylenedecahydronaphthalene-1-carboxylic acid (CAS 1909-90-6), molecular formula C20H32O3 and molecular weight 320.47 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, (1S,4aR,5S,8aR)-5-((R)-3-Hydroxy-3-methylpent-4-en-1-yl)-1,4a-dimethyl-6-methylenedecahydronaphthalene-1-carboxylic acid (C20H32O3) contains a steroid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 320.47 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C20H32O3 |
| Molecular Weight | 320.47 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Recommended Standards
- N-(5-Bromo-3-chloro-2-fluorophenyl)-2,2,2-trifluoroacetamide (CAS 1881331-06-1)
- 1909-91-7 Isocupressic acid 1-Naphthalenecarboxylic acid, decahydro-5-(5-hydroxy-3-methyl-3-pentenyl)-1,4a-dimethyl-6-methylene-, (1S-(1alpha,4aalpha,5alpha(E),8abeta))- 1-Naphthalenecarboxylic acid, decahydro-5-((3E)-5-hydroxy-3-methyl-3-pentenyl)-1,4a-dimethyl-6-methylene-, (1S,4aR,5S,8aR)- 15-Hydroxylabda-8(17),13-dien-19-oic acid (CAS 1909-91-7)
- 1265AH 17(S)-HETE 183509-25-3 C20H32O3 (CAS 183509-25-3)
- 14(15) EET (CAS 197508-62-6)
- Di-tert-butyl 2,2'-((quinoxaline-2,3-diylbis(oxy))bis(methylene))bis(piperidine-1-carboxylate) (CAS 1289385-21-2)
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- Ethyl (2R,3R)-3-aminobicyclo[2.2.2]octane-2-carboxylate hydrochloride (CAS 1626394-44-2)
- Des-Lys20(Side Chain)-Semaglutide (CAS CATO-C4X-2226280)
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