Trichlorosilane
Trichlorosilane
CAS: 10025-78-2
Molecular Formula: Cl3HSi
Trichlorosilane - Names and Identifiers
| Name | Trichlorosilane |
| Synonyms | silanea-19 trichlorosilyl Trichlorosilane Silane, trichloro silicon chloroform silici-chloroforme silici-chloroforme(french) Trichlorosilanecolorlessliq trichlorosilane pressure tin |
| CAS | 10025-78-2 |
| EINECS | 233-042-5 |
| InChI | InChI=1/Cl3Si/c1-4(2)3 |
| InChIKey | ZDHXKXAHOVTTAH-UHFFFAOYSA-N |
Trichlorosilane - Physico-chemical Properties
| Molecular Formula | Cl3HSi |
| Molar Mass | 135.45 |
| Density | 1.342g/mLat 25°C(lit.) |
| Melting Point | -127 °C |
| Boling Point | 32-34°C(lit.) |
| Flash Point | 7°F |
| Water Solubility | decomposes |
| Solubility | Soluble in benzene, ether, heptane, chloroform and carbon tetrachloride. |
| Vapor Presure | 9.75 psi ( 20 °C) |
| Vapor Density | 1 (vs air) |
| Appearance | Liquid |
| Specific Gravity | 1.342 |
| Color | Colorless |
| Odor | Sharp, choking, like hydrochloric acid. |
| Merck | 14,9646 |
| Storage Condition | Refrigerator |
| Stability | Stable, but extremely flammable. Pyrophoric - spontaneously ignites in air. Explosion hazard in air - note wide explosion limits. Reacts violently with water. Incompatible with moisture, acids, bases, |
| Sensitive | Air & Moisture Sensitive |
| Explosive Limit | 70% |
| Refractive Index | 1.4-1.402 |
| Physical and Chemical Properties | Character: colorless liquid. melting point -126.5 ℃ boiling point 33 ℃ relative density 1.34 soluble in carbon disulfide, carbon tetrachloride, chloroform, benzene and so on. |
| Use | It is used as a raw material for high molecular organic silicon compounds, and also used in the instrument industry |
Trichlorosilane - Risk and Safety
| Risk Codes | R12 - Extremely Flammable R14 - Reacts violently with water R17 - Spontaneously flammable in air R20/22 - Harmful by inhalation and if swallowed. R29 - Contact with water liberates toxic gas R35 - Causes severe burns |
| Safety Description | S16 - Keep away from sources of ignition. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S43 - In case of fire use ... (there follows the type of fire-fighting equipment to be used.) S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S7/9 - S43A - |
| UN IDs | UN 1295 4.3/PG 1 |
| WGK Germany | 1 |
| RTECS | VV5950000 |
| FLUKA BRAND F CODES | 4.5-21-31 |
| TSCA | Yes |
| HS Code | 28530090 |
| Hazard Class | 4.3 |
| Packing Group | I |
| Toxicity | LD50 orally in rats: 1.03 g/kg (Smyth) |
Trichlorosilane - Nature
Open Data Verified Data
colorless transparent liquid. Relative density 1- 34. Melting Point -126.5 °c. Boiling Point 33. Vapor pressure 53. 3kPa(14.5 ℃). Soluble in carbon disulfide, carbon tetrachloride, chloroform, benzene, etc. This product is flammable, in the air can spontaneous combustion, irritating odor. Steam in water or water
Gas can produce heat and toxic corrosive fumes. It burned strongly when exposed to open flame. By the decomposition of high heat to produce toxic chloride gas. Reaction with oxidant, there is a risk of combustion. Very volatile, toxic!
Last Update：2024-01-02 23:10:35
Trichlorosilane - Preparation Method
Open Data Verified Data
boiling chlorination method: After drying, the silicon powder was added to a chlorination fluidized bed furnace and reacted with dry hydrogen chloride gas introduced into the furnace at 340 °c. The generated crude trichlorosilane is separated from the silicon tetrachloride by the wet dust collector and the Tube Condenser to the distillation column, and the trichlorosilane gas from the distillation column
After condensation, the finished trichlorosilane was obtained.
Last Update：2022-01-01 11:00:06
Trichlorosilane - Use
Open Data Verified Data
The raw material for producing organosilicon compounds is also the basic raw material for producing polycrystalline silicon.
Last Update：2022-01-01 11:00:05
Trichlorosilane - Safety
Open Data Verified Data
wet flammable articles. Hazard code: GB Class 4.3 43049,UN N0.1295, IMDGCODE 4.3-1, Class 4. Collateral Hazard Class 3 and Class 8. Stainless steel barrel, net weight 40kg per barrel. Or with the tank car. The barrel must be equipped with exhaust valve and should have a clear "flammable" sign. Should be stored in a cool, dry, well-ventilated warehouse. Keep away from fire and heat source. The storage temperature should not exceed 25 ℃. The packaging must be sealed and free from moisture. It should be stored separately from oxidants, acids, alkalis, etc., and mixed storage is not required. Explosion-proof lighting and ventilation facilities shall be adopted. The use of spark-prone mechanical equipment and tools is prohibited. The storage area shall have respective leakage emergency treatment equipment and appropriate containment materials. Pay attention to moisture-proof, anti-sun and fire prevention during transportation. When loading and unloading, it should be handled with care, and impact is strictly prohibited. Fire, can be used dry powder, dry Sand Fire, avoid the use of water, foam, carbon dioxide, acid and alkali extinguishing agent. Fire-fighting personnel must wear filter-type gas masks (full face masks) or isolated respirators, and full-body fire-fighting and virus-proof clothing to put out fire in the upward wind direction. Toxicity and protection: eye and respiratory mucosa have a strong stimulating effect. High concentration, causing corneal opacity, respiratory tract inflammation, and even pulmonary edema, and can be accompanied by dizziness, Head Pain, Fatigue, Nausea, Vomit, Palpitations and other symptoms. Splash on the skin, can cause necrosis, ulcer long-term healing. Animal chronic poisoning can cause chronic catarrhal tracheitis, bronchitis and early pulmonary sclerosis. The maximum allowable concentration in the environment is 1mg/m3 (HCl must be detected). Splash on the skin: remove the contaminated clothing immediately and rinse with plenty of running water for at least 15min. The patient visited hospital. Eye contact: lift the eyelids immediately and rinse thoroughly with plenty of running water or saline for at least 15min. The patient visited hospital. Accidental inhalation: The patient was rapidly separated from the site to a place with fresh air. Keep airway unobstructed. Such as Dyspnea, to the delivery of oxygen. If breathing stops, perform artificial respiration immediately. The patient visited hospital. After Ingestion: Rinse your mouth with water and give you milk or egg white. The patient visited hospital. Production Workshop should be closed operation, partial ventilation. Operators must be specially trained and strictly follow the operating procedures. It is recommended to wear self-priming filter gas mask (full face mask), adhesive anti-virus clothing and rubber gloves. Stay away from fire and heat source. No smoking is allowed in the workplace. The use of explosion-proof ventilation systems and equipment. Avoid smoke. Prevents the release of smoke and vapors into the workplace air. Avoid contact with oxidants, acids and alkalis. Particular care should be taken to avoid contact with water. Fire fighting equipment and emergency treatment equipment for leakage shall be provided with corresponding varieties and quantities. Take a shower after work and observe personal hygiene. Production workers undergo pre-employment and regular medical examinations.
Last Update：2022-01-01 11:00:06
Trichlorosilane - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Trichlorosilane | Trichlorosilane, also known as trichlorosilane and silicochloroform, is used as a raw material for polymer organosilicon compounds. Trichlorosilane is not only an important intermediate in the manufacture of silane coupling agents and other silicone products, but also the main raw material for the manufacture of polysilicon. Silane coupling agent is an important, high-tech, high value-added silicone composite material, through the silane coupling agent can make the non-cross-linked resin to achieve cross-linking curing or modification, so in glass fiber, casting, tire rubber and other industries have been increasingly widely used. Silicon tetrachloride, the main by-product of the production of trichlorosilane, is also the main raw material for the manufacture of silicone. Its finished products include silicate, silicone oil, high temperature insulating paint, silicone resin, silicone rubber and heat-resistant lining materials. High-purity silicon tetrachloride is also an important raw material for the manufacture of high-purity silicon dioxide, inorganic silicon compounds, quartz fibers and optical fibers. The main uses of polysilicon products:(1) It can be made into solar cells to convert radiant energy into electrical energy;(2) High-purity crystalline silicon is an important semiconductor material;(3) Cermet, an important material for space navigation;(4) Optical fiber communication, the latest modern communication means;(5) Silicon organic compounds with excellent performance. |
| toxicity | after inhaling trichlorosilane vapor for several minutes, it showed excitement, respiratory reflex disorder and respiratory organ inflammation. Splashing on the skin can cause necrosis and ulcers will not heal for a long time. The maximum allowable concentration is 1 mg/m3 (HCl must be detected). Production personnel should wear airtight work clothes, anti-virus masks, airtight glasses, latex gloves and other labor protection products to prevent direct contact with respiratory organs, eyes and skin. The production equipment should be airtight and the workshop should be well ventilated. Take a shower after work and observe personal hygiene. Production workers undergo pre-employment and regular medical examinations. |
| Use | Used as a raw material for polymer organosilicon compounds, and also used in the instrument industry The raw material for the manufacture of organosilicon compounds is also the basic raw material for the production of polysilicon. |
| production method | boiling chlorination silicon powder is added to a chlorination boiling furnace after drying, and the drying hydrogen chloride gas in the furnace is reacted at 340 ℃. The generated crude trichlorosilane is separated from the silicon tetrachloride by a wet dust collector and a tube condenser to a distillation tower, and the trichlorosilane gas from the distillation tower is condensed to produce a finished product of trichlorosilane. Its Si 3HCl → SiHCl3 H2 |
| category | flammable liquid |
| toxicity classification | poisoning |
| acute toxicity | oral administration-rat LD50:1030 mg/kg; Inhalation-mouse LC50:1500 mg/m3/2 h |
| flammability hazard characteristics | flammable in case of open flame, high temperature and oxidant; toxic chloride and fluoride smoke in case of water or high temperature |
| storage and transportation characteristics | warehouse ventilation and low temperature drying; Store separately from oxidants and acids |
| fire extinguishing agent | dry powder, dry sand, carbon dioxide, foam |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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