1,1,3,3-Tetramethyl-1,3-dioctyldisiloxane CAS 18642-94-9
| CAS No. | 18642-94-9 |
| Molecular Formula | C20H46OSi2 |
| Molecular Weight | 358.75 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 1,1,3,3-Tetramethyl-1,3-dioctyldisiloxane is closely related to a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 1,1,3,3-Tetramethyl-1,3-dioctyldisiloxane (CAS 18642-94-9), a certified reference material (molecular formula C20H46OSi2, MW 358.75 g/mol) for analytical method development and quality control.
Owing to a hydroxyl group, an ether linkage, 1,1,3,3-Tetramethyl-1,3-dioctyldisiloxane is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 358.75 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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.
CATO manufactures 1,1,3,3-Tetramethyl-1,3-dioctyldisiloxane 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 | C20H46OSi2 |
| Molecular Weight | 358.75 g/mol |
| Purity | >95% |
| Storage | Store at room temperature |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | Stable under recommended storage conditions |
| Degree of Unsaturation (DBE) | -2.0 |
| CAS Registry Year (est.) | 1962 |
Related Tetramethyl Standards
- 4'-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2':6',2''-terpyridine (CAS 1176879-36-9)
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Recommended Standards
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- N-(3-Chloro-4-methylphenyl)-2-(2-mercapto-4-oxo-4,5-dihydro-1,3-thiazol-5-yl)acetamide (CAS 1142200-21-2)
- Methyl 2-(4-formylphenyl)acetate (CAS 96524-70-8)
- 3-[3-(trifluoromethyl)-1h-pyrazol-1-yl]propan-1-amine (CAS 1006455-31-7)
- 2-CYANOPHENYLBORONIC ACID NEOPENTYL ESTER (CAS 214360-47-1)
- 1,4-Dioxaspiro[5.5]undecane-9-carboxylic acid (CAS 1547039-39-3)
- 6-Fluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)quinoline (CAS 1627721-92-9)
- 2-(But-3-en-1-yl)-2-formylcyclohexyl acetate (CAS 143288-06-6)
- Prolactin-Releasing Peptide (1-31) (rat) (CAS 215510-06-8)
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