Product ID:DICHLOROSILANE
MSDS Date:Jan 24 1989
MSDS Number: EEEEY
Kit Part:=== Responsible Party ===
Company Name:MATHESON TRI-GAS, INC.
Address:959 ROUTE 46 EAST
City:PARSIPPANY
State:NJ
ZIP:07054-0624
Country:US
Info Phone Num:(USA) 973-257-1100, (WHITBY) 905-668-3570, (EDMONTON)
780-471-4036
Chemtrec Ind/Phone:18004249300

Telephone: (USA) 973-257-1100, (WHITBY) 905-668-3570, (EDMONTON)

DICHLOROSILANE

CAS: 4109-96-0

Fraction By Weight: 100.0%

Reports of Carcinogenicity:NTP:No IARC:No OSHA:No
Health Hazards Acute and Chronic:INHALATION: SHORT TERM EXPOSURE:
burns, difficulty breathing, headache, dizziness, bluish skin
color, lung congestion LONG TERM EXPOSURE: digestive disorders SKIN
CONTACT: SHORT TERM EXPOSURE: burns LONG TERM EXPOSURE: same as
effects reported in short term exposure EYE CONTACT: SHORT TERM
EXPOSURE: irritation (possibly severe) LONG TERM EXPOSURE: same as
effects reported in short term exposure INGESTION: SHORT TERM
EXPOSURE: burns LONG TERM EXPOSURE: same as effects reported in
short term exposure
Medical Cond Aggravated by Exposure:

First Aid: INHALATION: If adverse effects occur, remove to
uncontaminated area. Give artificial respiration if not breathing.
If breathing is difficult, oxygen should be administered by
qualified personnel. Get immediate medical attention. SKIN CONTACT:
Wash skin with soap and water for at least 15 minutes while
removing contaminated clothing and shoes. Get immediate medical
attention. Thoroughly clean and dry contaminated clothing and shoes
before reuse. Destroy contaminated shoes. EYE CONTACT: Immediately
flush eyes with plenty of water for at least 15 minutes. Then get
immediate medical attention. INGESTION: If a large amount is
swallowed, get medical attention. NOTE TO PHYSICIAN: For
inhalation, consider oxygen.

Flash Point:-35 F (-37 C)
Autoignition Temp:136 F (58 C)
Lower Limits:4.1%
Upper Limits:99%
Extinguishing Media:carbon dioxide, regular dry chemical Large fires:
Use regular foam or flood with fine water spray.
Fire Fighting Procedures:Move container from fire area if it can be
done without risk. Cool containers with water spray until well
after the fire is out. Stay away from the ends of tanks. For fires
in cargo or storage area: If this is impossible then take the
following precautions: Keep unnecessary people away, isolate hazard
area and deny entry. Let the fire burn. Withdraw immediately in
case of rising sound from venting safety device or any
discoloration of tanks due to fire. For tank, rail car or tank
truck: Let burn unless leak can be stopped immediately. For smaller
tanks or cylinders, extinguish and isolate from other flammables.
Evacuation radius: 800 meters (1/2 mile). Do not attempt to
extinguish fire unless flow of material can be stopped first. Cool
containers with water spray until well after the fire is out. Apply
water from a protected location or from a safe distance. Do not get
water directly on material. Large fires: Flood with fine water
spray. Reduce vapors with watespray. Avoid inhalation of material
or combustion by-products. Stay upwind and keep out of low areas.
Unusual Fire/Explosion Hazard:Severe fire hazard. Gas/air mixtures are
explosive. The gas is heavier than air. Vapors or gases may ignite
at distant ignition sources and flash back.

Spill Release Procedures:Avoid heat, flames, sparks and other sources
of ignition. Do not touch spilled material. Stop leak if possible
without personal risk. Reduce vapors with water spray. Do not get
water inside container. Small spills: Absorb with sand or other
non-combustible material. Collect spilled material in appropriate
container for disposal. Large spills: Dike for later disposal.
Remove sources of ignition. Keep unnecessary people away, isolate
hazard area and deny entry.
Neutralizing Agent:

Handling and Storage Precautions:Store and handle in accordance with
all current regulations and standards. Keep separated from
incompatible substances.
Other Precautions:

Respiratory Protection:Under conditions of frequent use or heavy
exposure, respiratory protection may be needed. Respiratory
protection is ranked in order from minimum to maximum. Consider
warning properties before use. For Unknown Concentrations or
Immediately Dangerous to Life or Health - Any supplied-air
respirator with full facepiece and operated in a pressure-demand or
other positive-pressure mode in combination with a separate escape
supply. Any self-contained breathing apparatus with a full
facepiece.
Ventilation:Provide local exhaust or process enclosure ventilation
system. Ensure compliance with applicable exposure limits.
Protective Gloves:Wear appropriate chemical resistant gloves.
Eye Protection:Wear splash resistant safety goggles with a faceshield.
Provide an emergency eye wash fountain and quick drench shower in
the immediate work area.
Other Protective Equipment:Wear appropriate chemical resistant
clothing.
Supplemental Safety and Health
DICHLOROSILANE: No occupational exposure limits established.

Boiling Pt:46 F (8 C)
Melt/Freeze Pt:-188 F (-122 C)
Vapor Pres:1.7 atm @ 20 C
Vapor Density:3.5
Spec Gravity:1.2
pH:acidic in solution
Evaporation Rate & Reference:Not applicable
Solubility in Water:reacts
Appearance and Odor:PHYSICAL STATE:gas COLOR:colorless ODOR:irritating
odor
Corrosion Rate:

Stability Indicator/Materials to Avoid:May polymerize violently or
explosively. Avoid contact with incompatible materials.
Stability Condition to Avoid:Avoid heat, flames, sparks and other
sources of ignition. Minimize contact with material. Keep out of
water supplies and sewers.
Hazardous Decomposition Products:Thermal decomposition products: acid
halides, halogenated compounds, crystalline silica, acid halides,
oxides of silicon Thermal decomposition products: acid halides,
halogenated compounds, crystalline silica, acid halides, oxides of
silicon
Conditions to Avoid Polymerization:May polymerize violently or
explosively. Avoid contact with incompatible materials.

Waste Disposal Methods:Dispose in accordance with all applicable
regulations.

Toxicological Information:DICHLOROSILANE: TOXICITY DATA: 215 ppm
inhalation-rat LC50 LOCAL EFFECTS: Corrosive: inhalation, skin,
eye, ingestion ACUTE TOXICITY LEVEL: Toxic: inhalation

Disclaimer (provided with this information by the compiling agencies):
This information is formulated for use by elements of the Department
of Defense. The United States of America in no manner whatsoever,
expressly or implied, warrants this information to be accurate and
disclaims all liability for its use. Any person utilizing this
document should seek competent professional advice to verify and
assume responsibility for the suitability of this information to their
particular situation.

Ecological:Not available

Transport Information:U.S. DOT 49 CFR 172.101: PROPER SHIPPING NAME:
Dichlorosilane ID NUMBER: UN2189 HAZARD CLASS OR DIVISION: 2.3
LABELING REQUIREMENTS: Poison gas; Flammable gas; Corrosive
QUANTITY LIMITATIONS: PASSENGER AIRCRAFT OR RAILCAR: Forbidden
CARGO AIRCRAFT ONLY: Forbidden

SARA Title III Information: SARA TITLE III SECTION 302 EXTREMELY
HAZARDOUS SUBSTANCES (40 CFR 355.30): Not regulated. SARA TITLE
III SECTION 304 EXTREMELY HAZARDOUS SUBSTANCES (40 CFR 355.40): Not
regulated. SARA TITLE III SARA SECTIONS 311/312 HAZARDOUS
CATEGORIES (40 CFR 370.21): ACUTE: Yes CHRONIC: No FIRE: Yes
REACTIVE: Yes SUDDEN RELEASE: Yes SARA TITLE III SECTION 313 (40
CFR 372.65): Not regulated.
Federal Regulatory Information:CERCLA SECTIONS 102a/103 HAZARDOUS
SUBSTANCES (40 CFR 302.4): Not regulated. OSHA PROCESS SAFETY
(29CFR1910.119): DICHLOROSILANE: 2500LBSTQ
State Regulatory Information: California Proposition 65: Not regulated.