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.
02 · Identifiers
Trichloromethylsilane identifiers and molecular data
Trichloromethylsilane CAS number and EC number
Trichloromethylsilane molecular formula and molecular weight
Other names for Trichloromethylsilane
- trichloro(methyl)silane
- methyltrichlorosilane
03 · GHS classification
Trichloromethylsilane hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Trichloromethylsilane pictograms and signal word
Trichloromethylsilane hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Flammable liquids GHS chapter 2.6 | Category 2 | H225 | GHS02 |
| Skin corrosion/irritation GHS chapter 3.2 | Category 2 | H315 | GHS07 |
| Serious eye damage/eye irritation GHS chapter 3.3 | Category 2A | H319 | GHS07 |
| Specific target organ toxicity - single exposure GHS chapter 3.8 | Category 3 | H335 | GHS07 |
Trichloromethylsilane hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H225 | Highly flammable liquid and vapour. |
| H335 | May cause respiratory irritation. |
| H315 | Causes skin irritation. |
| H319 | Causes serious eye irritation. |
Trichloromethylsilane supplemental EU statements (EUH)
| Code | Statement |
|---|---|
| EUH014 | Reacts violently with water. |
This page lists only the codes assigned to Trichloromethylsilane. The full reference lives on the hazard statements hub, the precautionary statements hub and the GHS pictograms hub.
Safety Data Sheet
Getting an SDS for Trichloromethylsilane
A Safety Data Sheet is written for a product, not for a substance: the supplier of the grade you actually buy issues it, so two suppliers of Trichloromethylsilane issue two different sheets. That is why there is no single authoritative SDS for a substance to download — what there is, is the job of collecting the sheets for the products you hold and keeping them current as suppliers revise them.
04 · Precautionary statements
Trichloromethylsilane precautionary statements
CLP Annex VI assigns 14 precautionary statements to Trichloromethylsilane. They are grouped the way a label groups them: what to do before handling, what to do when something has already happened, how to store it and how to dispose of it.
Prevention
What to do before and during handling so the hazard never happens.
Response
What to do once exposure, spillage or fire has already happened.
Reading the notation. … is a blank the supplier fills in — not a truncated sentence.· [square brackets] mark a part printed only when it applies.
05 · Names in the regulation
Trichloromethylsilane name in 23 EU languages
CLP Annex VI Part 3 is published in every language edition of the regulation, and the identification column is written out in each of them. Nothing below is translated by us: each line is the name as that edition prints it. Under Art. 18(2) the substance name from Annex VI is a lawful product identifier, so this is the wording to put on a label going to that market — and where the cell lists several designations, any one of them qualifies.
| Language | Name in CLP Annex VI Part 3 |
|---|---|
| Bulgarian български | трихлоро(метил)силан метилтрихлоросилан |
| Spanish español | Tricloro(metil)silano metiltriclorosilano |
| Czech čeština | trichlormethylsilan methyltrichlorsilan |
| Danish dansk | trichlor(methyl)silan methyltrichlorsilan |
| German Deutsch | Trichlor(methyl)silan Methyltrichlorsilan |
| Estonian eesti | trikloro(metüül)silaan metüültriklorosilaan |
| Greek ελληνικά | τριχλωρο(μεθυλo)σιλάνιο μεθυλοτριχλωρoσιλάνιo |
| English English | trichloro(methyl)silane methyltrichlorosilane |
| French français | trichloro(méthyl)silane méthyltrichlorosilane |
| Croatian hrvatski | triklor(metil)silan metiltriklorsilan |
| Italian italiano | metiltriclorosilano |
| Latvian latviešu | trihlor(metil)silāns metiltrihlorsilāns |
| Lithuanian lietuvių | trichlor(metil)silanas metiltrichlorsilanas |
| Hungarian magyar | triklór(metil)szilán metil-triklór-szilán |
| Maltese Malti | trikloro(metil)silan metiltriklorosilan |
| Dutch Nederlands | methyltrichloorsilaan |
| Polish polski | trichloro(metylo)silan metylotrichlorosilan |
| Portuguese português | tricloro(metil)silano metiltriclorossilano |
| Romanian română | tricloro(metil)silan metiltriclorosilan |
| Slovak slovenčina | trichlór(metyl)silán trichlórmetylsilán |
| Slovenian slovenščina | trikloro(metil)silan metiltriklorosilan |
| Finnish suomi | trikloorimetyylisilaani metyylitriklorosilaani |
| Swedish svenska | triklor(metyl)silan metyltriklorsilan |
All 23 language editions of Annex VI carry this entry. Irish is the twenty-fourth official EU language and has no line here for a different reason: no consolidated CLP text has ever been published in Irish, so there is no Irish edition of Annex VI to quote a name from. Source: consolidated CLP, CELEX 02008R1272, language editions. © European Union, https://eur-lex.europa.eu — only the electronic Official Journal of the European Union is authentic.
06 · Label elements
Trichloromethylsilane GHS label elements
Everything CLP Annex VI fixes for Trichloromethylsilane, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Trichloromethylsilane
- Highly flammable liquid and vapour.
- May cause respiratory irritation.
- Causes skin irritation.
- Causes serious eye irritation.
- Reacts violently with water.
- Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
- Keep container tightly closed.
- Use explosion-proof [electrical/ventilating/lighting/…] equipment.
- Use only non-sparking tools.
- Wash … thoroughly after handling.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF ON SKIN:
- IF IN EYES:
- Get medical advice/attention.
- If skin irritation occurs:
- If eye irritation persists:
- Remove contact lenses, if present and easy to do. Continue rinsing.
- Wash with plenty of water/…
- Store in a well-ventilated place.
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Trichloromethylsilane in the GHS label constructor →
07 · Health hazards
Trichloromethylsilane health hazards and exposure limits
Trichloromethylsilane hazard summary
Liquid may cause second or third degree burns after brief skin contact. [CHRIS] Reacts violently with water to release hydrogen chloride; Inhalation can cause acute pulmonary edema; [ICSC] Toxicity is due to HCl, which is released when methytrichlorosilane contacts moisture; [AIHA]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
08 · 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.
Trichloromethylsilane boiling point
| 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 |
Trichloromethylsilane melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | -90 °C (-130 °F) | HSDB | |
| -77.78 °C (-108 °F) | CAMEO |
Trichloromethylsilane density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.3 g/cm³ | ICSC | |
| 1.27 g/cm³ | at 25 °C | HSDB |
Trichloromethylsilane solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Solubility in water: reaction | ICSC | |
| Decomposes in ethanol | decomposes | HSDB | |
| Decomposes instantly in water | decomposes | HSDB |
Trichloromethylsilane vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 134.261 mmHg | at 20 °C | ICSC |
| 167 mmHg | at 25 °C | HSDB | |
| 75 mmHg | at 7 °C | DOE PAC |
Trichloromethylsilane flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | -9.44 °C (15 °F) | HSDB | |
| 8 °C (46.4 °F) | ICSC |
Trichloromethylsilane autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | 490 °C (914 °F) | ICSC | |
| 404.44 °C (760 °F) | above this value | HSDB |
Trichloromethylsilane lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | 7.6 % by volume | HSDB | |
| 7.2 % by volume | ICSC |
Trichloromethylsilane upper explosive limit (UEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Upper explosive limit (UEL) | 11.9 % by volume | HSDB | |
| 20 % by volume | CAMEO |
Trichloromethylsilane vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| 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.
09 · Fire and explosion
Trichloromethylsilane fire and explosion behaviour
These are descriptions rather than measured values, so they are kept out of the table above and quoted here with the source that reported them.
Trichloromethylsilane fire potential
... Silanes ... form spontaneously flammable ... mixtures with air. /Silanes/
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
Trichloromethylsilane storage and handling
Trichloromethylsilane safe storage
Fireproof. Separated from oxidants. Cool. Dry. Well closed.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Trichloromethylsilane storage conditions
Fireproof ... Well closed.
Source: Hazardous Substances Data Bank (HSDB)
Trichloromethylsilane incompatible materials
Silane and chlorosilanes can explode when mixed with various halocarbons and ignited.
Source: Hazardous Substances Data Bank (HSDB)
Trichloromethylsilane 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 →
11 · Questions
Trichloromethylsilane — frequently asked questions
What is the CAS number of Trichloromethylsilane?
The CAS number of Trichloromethylsilane is 75-79-6. Its EC number is 200-902-6.
What is the chemical formula of Trichloromethylsilane?
The molecular formula of Trichloromethylsilane is CH3Cl3Si and its molecular weight is 149.47 g/mol.
What does a Trichloromethylsilane label have to show?
Under CLP Annex VI the label for Trichloromethylsilane carries the pictograms Flame and Exclamation mark and the signal word is Danger.
Is Trichloromethylsilane flammable?
Yes. CLP Annex VI assigns Trichloromethylsilane H225 — highly flammable liquid and vapour. The flash point reported for it is -9.44 °C (15 °F) (HSDB).
Is Trichloromethylsilane a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Trichloromethylsilane. Annex VI is a list of agreed classifications, not a list of substances found safe, so this is an absence of a classification rather than a clean bill of health.
What is the boiling point of Trichloromethylsilane?
The boiling point reported for Trichloromethylsilane is 65.6 °C (150.1 °F) (HSDB).
What is the melting point of Trichloromethylsilane?
The melting point reported for Trichloromethylsilane is -90 °C (-130 °F) (HSDB).
How should Trichloromethylsilane be stored?
CLP Annex VI assigns Trichloromethylsilane the storage statement P403. Fireproof ... Well closed. (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Trichloromethylsilane
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