Substance profile
Trichloromethylsilane
Trichloromethylsilane is a colorless liquid with an acrid odor, sharp like hydrochloric acid.
01 · Identification
What Trichloromethylsilane is
Trichloromethylsilane is a colorless liquid with an acrid odor, sharp like hydrochloric acid. Its molecular formula is CH3Cl3Si and its molecular weight is 149.47 g/mol. It boils at 65.6 °C, melts at -90 °C.
Under the GHS it carries the signal word Danger. It is classed as corrosives.
Other names for Trichloromethylsilane
- trichloro(methyl)silane
- methyltrichlorosilane
02 · GHS classification
Hazards and label elements
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
| Code | Hazard statement |
|---|---|
| H225 | Highly flammable liquid and vapour. |
| H335 | May cause respiratory irritation. |
| H315 | Causes skin irritation. |
| H319 | Causes serious eye irritation. |
Supplemental EU statements: EUH014
Precautionary statements: P210, P233, P241, P242, P264, P280, P302, P305, P313, P332, P337, P338, P352, P403
03 · Physical and chemical properties
Trichloromethylsilane properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 65.6 °C (150.1 °F) | HSDB | |
| 66.67 °C (152 °F) | at 760 mmHg | CAMEO | |
| 66 °C (150.8 °F) | ICSC | ||
| Melting point | -90 °C (-130 °F) | HSDB | |
| -77.78 °C (-108 °F) | CAMEO | ||
| Density | 1.3 g/cm³ | ICSC | |
| 1.27 g/cm³ | at 25 °C | HSDB | |
| Solubility | Solubility in water: reaction | ICSC | |
| Decomposes in ethanol | decomposes | HSDB | |
| Decomposes instantly in water | decomposes | HSDB | |
| Vapor pressure | 134.261 mmHg | at 20 °C | ICSC |
| 167 mmHg | at 25 °C | HSDB | |
| 75 mmHg | at 7 °C | DOE PAC | |
| Flash point | -9.44 °C (15 °F) | HSDB | |
| 8 °C (46.4 °F) | ICSC | ||
| Autoignition temperature | 490 °C (914 °F) | ICSC | |
| 404.44 °C (760 °F) | above this value | HSDB | |
| Lower explosive limit (LEL) | 7.6 % by volume | HSDB | |
| 7.2 % by volume | ICSC | ||
| Upper explosive limit (UEL) | 11.9 % by volume | HSDB | |
| 20 % by volume | CAMEO | ||
| Vapor density | 5.17 (air = 1) | HSDB | |
| 5.2 (air = 1) | ICSC |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Trichloromethylsilane
Storage conditions
Fireproof ... Well closed.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Silane and chlorosilanes can explode when mixed with various halocarbons and ignited.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
Chlorosilanes, such as METHYLTRICHLOROSILANE, are compounds in which silicon is bonded to from one to four chlorine atoms with other bonds to hydrogen and/or alkyl groups. Chlorosilanes react with water, moist air, or steam to produce heat and toxic, corrosive fumes of hydrogen chloride. They may also produce flammable gaseous H2. They can serve as chlorination agents. Chlorosilanes react vigorously with both organic and inorganic acids and with bases to generate toxic or flammable gases.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Trichloromethylsilane in the storage compatibility matrix →