68083-19-2 Siloxanes and Silicones, di-Me, vinyl group-terminated Dow corning 3-4939 Dow corning 6646 GE 3175 Polydimethylsiloxane, vinyl end blocked PS 441 PS 442 PS 448 Sylgard 170A Vinyl dimethylsiloxy-terminated polydimethylsiloxane CAS 68083-19-2
| CAS No. | 68083-19-2 |
| Molecular Formula | C2H6OSi |
| Molecular Weight | 74.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
68083-19-2 Siloxanes and Silicones, di-Me, vinyl group-terminated Dow corning 3-4939 Dow corning 6646 GE 3175 Polydimethylsiloxane, vinyl end blocked PS 441 PS 442 PS 448 Sylgard 170A Vinyl dimethylsiloxy-terminated polydimethylsiloxane (CAS 68083-19-2), molecular formula C2H6OSi and molecular weight 74.15 g/mol, is a CATO reference standard with documented purity and traceability.
68083-19-2 Siloxanes and Silicones, di-Me, vinyl group-terminated Dow corning 3-4939 Dow corning 6646 GE 3175 Polydimethylsiloxane, vinyl end blocked PS 441 PS 442 PS 448 Sylgard 170A Vinyl dimethylsiloxy-terminated polydimethylsiloxane (C2H6OSi) contains a hydroxyl group, an ether linkage. Its physicochemical properties are representative of its class; these physicochemical properties determine the optimal preparation and storage of its standard solutions.
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 | C2H6OSi |
| Molecular Weight | 74.15 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Stable under recommended storage conditions |
| Degree of Unsaturation (DBE) | 0.0 |
| CAS Registry Year (est.) | 1976 |
Related Siloxanes Standards
- 70131-67-8 Siloxanes and Silicones, di-Me, hydroxy-terminated Siloxanes and Silicones di-Me, hydroxy-terminated 42% in dimethyl hydrolyzate Q 4-2737 X 21-22-160AS X 22-160A X 22-160AS X 22-160B X 22-176B Baysilon C 0.7 FM 0411 alpha-Hydro-omega-hydroxypoly(dimethylsiloxane) Macromonomer HK20 Polydimethylsiloxane, hydroxy end-blocked PS 195 PS 339.7 RF 5000 Silanol-terminated di-Me siloxanes Silicone L-90000/1000 Siltech S 700 Poly(oxy(dimethylsilylene), alpha-hydro, omega-hydroxy- Hydroxy-terminated dimethyl siloxanes and silicones (CAS 70131-67-8)
- 67923-13-1 Siloxanes and Silicones, di-Me, chlorine-terminated alpha,omega-Dichloropolydimethyl siloxane Dichloropoly(dimethylsiloxane) Polydimethylsiloxane, chloro end-blocked Poly(oxy(dimethylsilylene)), alpha-chlorodimethylsilyl-omega-chloro- alpha,omega-Dichloropolydimethylsiloxane (CAS 67923-13-1)
- Siloxanes and Silicones, di-Me, mono(vinyl group)-terminated (CAS 68952-00-1)
- Siloxanes and Silicones, di-Me, 3-hydroxypropyl group-terminated (CAS 104780-66-7)
- Siloxanes and Silicones, di-Me, Me 3,3,3-trifluoropropyl, vinyl group-terminated (CAS 68951-98-4)
- Siloxanes and Silicones, di-Me, Me octyl, Me vinyl (CAS 597543-32-3)
Recommended Standards
- Dimethylsilanone (CAS 47956-45-6)
- 70900-21-9 Poly(dimethylsiloxane), hydride terminated MFCD00197934 Siloxanes and silicones, dimethyl hydrogen terminated (CAS 70900-21-9)
- Cyclomethicone 6 (CAS 69430-24-6)
- n-Pentane-2,2-d (CAS 87128-66-3)
- 3-{[2-Bromo-4-(sec-butyl)phenoxy]-methyl}piperidine hydrochloride (CAS 1220018-61-0)
- 1633-43-8 2-ethoxy-5-amino pyridine 3-amino-4-ethoxypyridine 4-Ethoxypyridin-3-amine 4-ethoxy-3-aminopyridine 4-ethoxy-3-pyridinamine 6-ethoxy-pyridin-3-ylamine (CAS 1633-43-8)
- N-Chloromethyl-benzothiazole-2-thione (CAS 41526-42-5)
- MEthyl 5-methoxy-[1,1'-biphenyl]-3-carboxylate (CAS 184095-59-8)
- 3-(Triphenylsilyl)propanoic acid (CAS 18752-17-5)
- 4,4’-Diamino-2,2’-difluorobiphenyl (CAS 316-64-3)
- 1-Butyl-5-methyl-1h-1,2,3-triazole-4-carboxylic acid (CAS 1251309-19-9)
- Ethyl 2-oxo-1,2-dihydroquinoline-5-carboxylate (CAS 1261788-19-5)
- 5-Chloro-6-methoxynicotinaldehyde (CAS 132865-44-2)
- Semaglutide impurity 86 (CAS CATO-C4X-222686)
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