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Dichlorosilane

Dichlorosilane structure

CAS No:
4109-96-0
Formula:
Cl2H2Si
Chemical Name:
Dichlorosilane
Synonyms:
Silane,dichloro-;Dichlorosilane;Silicon chloride hydride (SiH2Cl2);Silicon chloride hydride (SiCl2H2);Dichlorosilane(SiH2Cl2);Silicon chloride hydride (Cl2H2Si);438546-17-9
Categories:
Chemical Reagents > Silane Reagent

Description

colourless gas

Dichlorosilane is a flammable and poisonous gas, with a strong repulsive odor. It is easily ignited in air, reacts with oxidizing agents, is very toxic by inhalation, and is a strong irritant to skin, eyes and mucous membranes. Under prolonged exposure to fire or intense heat the container may rupture violently or rocket.|GasVapor; Liquid|COLOURLESS GAS WITH CHARACTERISTIC ODOUR.

Dichlorosilane Basic Attributes

Molecular Weight：

101.01

Exact Mass：

101.01

EC Number：

223-888-3

ICSC Number：

0442

UN Number：

2189

DSSTox ID：

DTXSID1052082

Characteristics

PSA：

XLogP3：

0.46280

Appearance：

Density：

1.220 g/cm³ @ Temp: 7 °C

Melting Point：

-122 °C

Boiling Point：

8 °C

Flash Point：

-37°C

Water Solubility：

Decomposes in water

Vapor Pressure：

1254 mm Hg ( 20 °C)

Vapor Density：

3.5 (vs air)

Explosive limit：

99%

Air and Water Reactions：

Highly flammable. Based on the properties of similar materials, there is the possibility that the reaction of this compound with water may be vigorous or violent. Products of the reaction include hydrogen chloride. The reaction generates heat and this heat may be sufficient to ignite the product. The chlorosilicon hydrides(ClxSiHy) are spontaneously flammable in air, NFPA 1991.

Reactive Group：

Chlorosilanes

Reactivity Alerts：

Highly Flammable

Reactivity Profile：

Chlorosilanes, such as DICHLOROSILANE, 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.

Physical Dangers：

The gas is heavier than air and may travel along the ground; distant ignition possible.

Safety Information

Hazard category：

2.3

Transport codes：

UN 2189 2.3

wgk germany：

hazard class code：

12-14-23-34

safety instructions：

26-36/37/39-45

RTECS Number：

VV3050000

Marks：

F+,T

Storage features：

Fireproof. Keep in a well-ventilated room.

Stability/Shelf Life：

Stable. Extremely flammable; note very wide explosion limits. Reacts violently with water, alcohols, strong oxidizing agents, bases.

Precautionary statement(s)：

P210-P261-P280-P305 + P351 + P338-P310-P410 + P403

Hazard Statements：

H220-H280-H314-H331

Fire Hazards：

Excerpt from ERG Guide 119 [Gases - Toxic - Flammable]: Flammable; may be ignited by heat, sparks or flames. May form explosive mixtures with air. Those substances designated with a (P) may polymerize explosively when heated or involved in a fire. Vapors from liquefied gas are initially heavier than air and spread along ground. Vapors may travel to source of ignition and flash back. Some of these materials may react violently with water. Cylinders exposed to fire may vent and release toxic and flammable gas through pressure relief devices. Containers may explode when heated. Ruptured cylinders may rocket. Runoff may create fire or explosion hazard. (ERG, 2016)|Extremely flammable. Gives off irritating or toxic fumes (or gases) in a fire. Gas/air mixtures are explosive.|Flammable - 4th degree, Reactive - 2nd degree

GHS Classification：

|Danger|H220 (100%): Extremely flammable gas [Danger Flammable gases]|P210, P231+P232, P260, P261, P264, P271, P280, P284, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P311, P320, P321, P363, P370+P378, P377, P381, P402+P404, P403, P403+P233, P405, P410+P403, and P501|Aggregated GHS information provided by 159 companies from 6 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.|H220: Extremely flammable gas [Danger Flammable gases]|P210, P260, P264, P270, P271, P280, P284, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P309+P311, P310, P320, P321, P363, P377, P381, P403, P403+P233, P405, P410+P403, and P501

Fire Fighting：

Excerpt from ERG Guide 119 [Gases - Toxic - Flammable]: DO NOT EXTINGUISH A LEAKING GAS FIRE UNLESS LEAK CAN BE STOPPED. SMALL FIRE: Dry chemical, CO2, water spray or alcohol-resistant foam. LARGE FIRE: Water spray, fog or alcohol-resistant foam. FOR CHLOROSILANES, DO NOT USE WATER; use AFFF alcohol-resistant medium-expansion foam. Move containers from fire area if you can do it without risk. Damaged cylinders should be handled only by specialists. FIRE INVOLVING TANKS: Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Cool containers with flooding quantities of water until well after fire is out. Do not direct water at source of leak or safety devices; icing may occur. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks engulfed in fire. (ERG, 2016)|Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out. In other cases extinguish with foam, powder. Combat fire from a sheltered position.

Isolation and Evacuation：

Excerpt from ERG Guide 119 [Gases - Toxic - Flammable]: As an immediate precautionary measure, isolate spill or leak area for at least 100 meters (330 feet) in all directions. SPILL: See ERG Table 1 - Initial Isolation and Protective Action Distances on the UN/NA 2189 datasheet. FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 1600 meters (1 mile) in all directions; also, consider initial evacuation for 1600 meters (1 mile) in all directions. (ERG, 2016)

Nonfire Spill Response：

Excerpt from ERG Guide 119 [Gases - Toxic - Flammable]: ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area). All equipment used when handling the product must be grounded. Fully encapsulating, vapor-protective clothing should be worn for spills and leaks with no fire. Do not touch or walk through spilled material. Stop leak if you can do it without risk. Do not direct water at spill or source of leak. Use water spray to reduce vapors or divert vapor cloud drift. Avoid allowing water runoff to contact spilled material. FOR CHLOROSILANES, use AFFF alcohol-resistant medium-expansion foam to reduce vapors. If possible, turn leaking containers so that gas escapes rather than liquid. Prevent entry into waterways, sewers, basements or confined areas. Isolate area until gas has dispersed. (ERG, 2016)

Personal Protective Equipment：

Excerpt from ERG Guide 119 [Gases - Toxic - Flammable]: Wear positive pressure self-contained breathing apparatus (SCBA). Wear chemical protective clothing that is specifically recommended by the manufacturer. It may provide little or no thermal protection. Structural firefighters' protective clothing provides limited protection in fire situations ONLY; it is not effective in spill situations where direct contact with the substance is possible. (ERG, 2016)

Explosive Limits and Potential：

Explosive limits , vol% in air: 4.1-99

Spillage Disposal：

Evacuate danger area! Consult an expert! Personal protection: chemical protection suit including self-contained breathing apparatus. Ventilation.

Safe Storage：

Fireproof. Keep in a well-ventilated room.

Inhalation Risk：

A harmful concentration of this gas in the air will be reached very quickly on loss of containment.

Effects of Short Term Exposure：

Lachrymation. The substance is corrosive to the eyes, skin and respiratory tract. Inhalation may cause lung oedema. Rapid evaporation of the liquid may cause frostbite. Exposure at high levels could cause death. The effects may be delayed. Medical observation is indicated.

Fire Prevention：

NO open flames, NO sparks and NO smoking. Closed system, ventilation, explosion-proof electrical equipment and lighting.

Exposure Prevention：

AVOID ALL CONTACT!

Inhalation Prevention：

Use ventilation, local exhaust or breathing protection.

Skin Prevention：

Cold-insulating gloves. Protective clothing.

Eye Prevention：

Wear safety goggles or eye protection in combination with breathing protection.

Drug Information

Health Hazards：

Excerpt from ERG Guide 119 [Gases - Toxic - Flammable]: TOXIC; may be fatal if inhaled or absorbed through skin. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control may cause pollution. (ERG, 2016)

First Aid：

Excerpt from ERG Guide 119 [Gases - Toxic - Flammable]: Ensure that medical personnel are aware of the material(s) involved and take precautions to protect themselves. Move victim to fresh air. Call 911 or emergency medical service. Give artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; give artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing and shoes. In case of contact with substance, immediately flush skin or eyes with running water for at least 20 minutes. In case of contact with liquefied gas, thaw frosted parts with lukewarm water. In case of burns, immediately cool affected skin for as long as possible with cold water. Do not remove clothing if adhering to skin. Keep victim calm and warm. Keep victim under observation. Effects of contact or inhalation may be delayed. (ERG, 2016)

Fresh air, rest. Half-upright position. Refer for medical attention.

Rinse skin with plenty of water or shower. Refer for medical attention .

First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.

MeSH Entry Terms：

dichlorosilane

Exposure Routes：

The substance can be absorbed into the body by inhalation.

Symptoms：

Sore throat. Cough. Burning sensation. Shortness of breath. Laboured breathing. Symptoms may be delayed.

Pain. Redness. Blisters. Skin burns. Frostbite.

Pain. Redness. Severe deep burns. Loss of vision.

Dichlorosilane Use and Manufacturing

Methods of Manufacturing

The silicon powder and hydrogen chloride are reacted in an appropriate ratio to produce dichlorodihydrosilicon, which is separated by distillation, and the obtained dichlorodihydrosilicon is refined to obtain an electronic grade high-purity dichlorodihydrosilicon product. Si+2HCl→SiH2C12

Uses

Used for epitaxial growth of polysilicon and chemical vapor deposition of silicon dioxide and silicon nitride in the electronics industry

Intermediates

Electrical and electronic products

Production

10,000,000 - 50,000,000 lb

Manufacturing Info：

All other basic inorganic chemical manufacturing|Silane, dichloro-: ACTIVE

Use Classification：

Fire Hazards -> Flammable - 4th degree, Reactive - 2nd degree

Computed Properties

Molecular Weight:101.00
Exact Mass:99.9302820
Monoisotopic Mass:99.9302820
Heavy Atom Count:3
Complexity:2.8
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

Material

Methyl ether

Hydrogen

Silicon

Trichloromethylsilane

Hydrochloric acid

Recommended Suppliers of Dichlorosilane

Suqian City Hengliyuan Import and Export Trade Co., LTD Contact Supplier

CN
2 YRS

Business licensed

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Dichlorosilane 4109-96-0 Cl2H2Si

CAS No.: 4109-96-0

Grade: organic chemistry

Content: 98%

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