Chlorodimethyloctadecylsilane
Synonym(s):Dimethyloctadecylchlorosilane;Dimethyl-octadecylchlorosilane;Octadecyldimethylchlorosilane;Silane ODM-Tol Sol
- CAS NO.：18643-08-8
- Empirical Formula: C20H43ClSi
- Molecular Weight: 347.09
- MDL number: MFCD00000504
- EINECS: 242-472-2
- SAFETY DATA SHEET (SDS)
- Update Date: 2025-09-25 17:15:13
What is Chlorodimethyloctadecylsilane?
Chemical properties
white to off-white crystalline powder or
The Uses of Chlorodimethyloctadecylsilane
Chlorodimethyl-n-octadecylsilane is used for preparation of hydrophobic surfaces and chain terminator.
The Uses of Chlorodimethyloctadecylsilane
Silylating reagent
Flammability and Explosibility
Not classified
Synthesis
Octadecyldimethylchlorosilane is prepared by reacting 1-Octadecene with Chlorodimethylsilane heated at 65℃.
Properties of Chlorodimethyloctadecylsilane
| Melting point: | 28-31 °C |
| Boiling point: | 145-155 °C0.005 mm Hg(lit.) |
| Density | 0.86 g/mL at 20 °C(lit.) |
| vapor pressure | 0-4220000Pa at 20-25℃ |
| refractive index | 1.4530 |
| Flash point: | >230 °F |
| form | Solid |
| color | White |
| Specific Gravity | 0.854 |
| Water Solubility | Reacts with water. |
| Sensitive | Moisture Sensitive |
| Hydrolytic Sensitivity | 8: reacts rapidly with moisture, water, protic solvents |
| BRN | 2246012 |
| CAS DataBase Reference | 18643-08-8(CAS DataBase Reference) |
| EPA Substance Registry System | Silane, chlorodimethyloctadecyl- (18643-08-8) |
Safety information for Chlorodimethyloctadecylsilane
| Signal word | Danger |
| Pictogram(s) |
 Corrosion Corrosives GHS05  Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H314:Skin corrosion/irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P260:Do not breathe dust/fume/gas/mist/vapours/spray. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P301+P330+P331:IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for Chlorodimethyloctadecylsilane
| InChIKey | GZGREZWGCWVAEE-UHFFFAOYSA-N |
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