4,4-Dimethyl-5a-cholesta-8,14-dien-3b-ol CAS 19456-83-8
| CAS No. | 19456-83-8 |
| Molecular Formula | C29H48O |
| Molecular Weight | 412.69 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4,4-Dimethyl-5a-cholesta-8,14-dien-3b-ol (C29H48O) contains a steroid core, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
4,4-Dimethyl-5a-cholesta-8,14-dien-3b-ol (CAS 19456-83-8), molecular formula C29H48O and molecular weight 412.69 g/mol, is a CATO reference standard with documented purity and traceability.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C29H48O |
| Molecular Weight | 412.69 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
Related Dimethyl Standards
- (3b)-4,4-Dimethyl-cholesta-5,7-dien-3-ol (CAS 53296-71-2)
- 2,6-Dimethyl-4-(3-(4-pentylcyclohexyl)-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-6-yl)phenol (CAS 860611-17-2)
- 2,2-Dimethyl-2,3-dihydrobenzofuran-7-yl N,N-dibutylsulfamoyl(methyl)carbamate (CAS 73315-64-7)
- 1-((1'-Benzyl-4',5'-dimethyl-1'H-[1,2'-bipyrrol]-3'-yl)methyl)-3-(p-tolyl)urea (CAS 478077-25-7)
- 5,5-Dimethyl-3-oxo-2-((phenylsulfonyl)methyl)cyclohex-1-en-1-yl 4-methylbenzoate (CAS 339098-54-3)
- 2,2'-Dimethyl-[1,1'-bianthracene]-9,9'(10H,10'H)-dione (CAS 3438-08-2)
- 4,4'-Dimethyl-[1,1'-bianthracene]-9,9'(10H,10'H)-dione (CAS 24541-19-3)
- 4,4'-((3,3'-Dimethyl-[1,1'-biphenyl]-4,4'-diyl)bis(azanediyl))bis(4-oxobutanoic acid) (CAS 293761-41-8)
Recommended Standards
- 2-Hydroxytetracosanoic acid ethyl ester (CAS 124111-47-3)
- Stigmast-4-en-3-one (CAS 1058-61-3)
- 2-Phenyl-[1,2,4]triazolo[1,5-a]pyridine (CAS 779-24-8)
- Maxacalcitol Impurity 20 (CAS 192573-35-6)
- 4-chloro-1-(prop-2-en-1-yl)-1H-pyrazolo[3,4-d]pyrimidine (CAS 937734-85-5)
- 2-(5-Bromobenzo[d]isoxazol-3-yl)acetic acid (CAS 34173-12-1)
- 1-(4-Chloro-2-fluorophenyl)cyclobutane-1-carboxylic acid (CAS 1511861-89-4)
- Lemborexant Impurity 69 (CAS CATO-C4X-304269)
- (4-Cyanobenzyl)glycine (CAS 328552-85-8)
- 5-Chloro-2,4-dimethoxyphenylboronic acid (CAS 1393536-52-1)
- (4-Chlorophenyl)(tetrahydrofuran-3-yl)methanamine (CAS 1250330-72-3)
- Tert-butyl 4-fluoro-1,9-diazaspiro[5.5]Undecane-9-carboxylate (CAS 1889526-60-6)
- Ethyl 5-oxo-5-[3-(pyrrolidinomethyl)phenyl]valerate (CAS 898771-04-5)
- Des-Gly29,30-Tirzepatide (CAS CATO-CPTD788944)
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