1,1,1,3,5,7,7,7-Octamethyl-3,5-diphenyltetrasiloxane CAS 13270-97-8
| CAS No. | 13270-97-8 |
| Molecular Formula | C20H34O3Si4 |
| Molecular Weight | 434.82 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 1,1,1,3,5,7,7,7-Octamethyl-3,5-diphenyltetrasiloxane.
1,1,1,3,5,7,7,7-Octamethyl-3,5-diphenyltetrasiloxane (CAS 13270-97-8) is a high-purity analytical reference standard with the molecular formula C20H34O3Si4 and a molecular weight of 434.82 g/mol.
Structurally, 1,1,1,3,5,7,7,7-Octamethyl-3,5-diphenyltetrasiloxane (C20H34O3Si4) contains a steroid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 434.82 g/mol, it falls into the moderately-high-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 1,1,1,3,5,7,7,7-Octamethyl-3,5-diphenyltetrasiloxane 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 | C20H34O3Si4 |
| Molecular Weight | 434.82 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1960 |
Related Octamethyl Standards
- 3,3,7,7,11,11,15,15-Octamethyl-1,5,9,13-tetrathiacyclohexadecane (CAS 110935-37-0)
- 1,1,4,4,7,7,10,10-Octamethyl-2,3,4,7,8,9,10,12-octahydro-1H-dibenzo[b,h]fluorene (CAS 77308-48-6)
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- 2,2,3,3,9,9,10,10-OCTAMETHYL-4,8-DIOXA-3,9-DISILAUNDECAN-6-ONE (CAS 127382-65-4)
Recommended Standards
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- 7-Chloro-5-iodo-1-(triisopropylsilyl)-1H-pyrrolo[2,3-c]pyridine (CAS 1198097-05-0)
- Disperse Violet 93 (Cl derivative) (CAS 66557-45-7)
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- Ethyl 2-[methyl(2-nitrophenyl)amino]acetate (CAS 116059-07-5)
- 2-Cyclobutyl-4-methylpentanoic acid (CAS 1500308-75-7)
- Des-Pro36-Tirzepatide (CAS CATO-CPTD788937)
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