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Dichlorodimethylsilane
CAS No.: 75-78-5
Synonyms:
Formula: C2H6Cl2Si
Exact Mass: 127.96200
Molecular Weight: 129.06100
PSA: 0.00000
LogP: 2.16580
Reference Price: $2,581/ton Inquiry Now
Dichlorodimethylsilane 75-78-5 MSDS
Name: Dichlorodimethylsilane 99% Material Safety Data Sheet
Synonym: Dichloromethylsilane; Dimethyl-dichlorsilan, DCDMS
CAS: 75-78-5
Section 1 - Chemical Product   MSDS Name:Dichlorodimethylsilane 99% Material Safety Data Sheet
Synonym:Dichloromethylsilane; Dimethyl-dichlorsilan, DCDMS

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content EINECS#
75-78-5 Dichlorodimethylsilane 99% 200-901-0
Hazard Symbols: F C
Risk Phrases: 12 36/37/38

Section 3 - HAZARDS IDENTIFICATION
  EMERGENCY OVERVIEW
Extremely flammable. Irritating to eyes, respiratory system and skin.Corrosive.Lachrymator (substance which increases the flow of tears).Water-reactive.
Potential Health Effects
Eye:
Causes eye burns. Lachrymator (substance which increases the flow of tears).
Skin:
Causes skin burns.
Ingestion:
May cause severe gastrointestinal tract irritation with nausea, vomiting and possible burns. May be harmful if swallowed.
Inhalation:
May cause irritation of the respiratory tract with burning pain in the nose and throat, coughing, wheezing, shortness of breath and pulmonary edema. Causes chemical burns to the respiratory tract.
Inhalation may be fatal as a result of spasm, inflammation, edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema.
Chronic:
No information found.

Section 4 - FIRST AID MEASURES
  Eyes: Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.
Skin:
Get medical aid immediately. Immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes.
Ingestion:
Do not induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
Inhalation:
Get medical aid immediately. Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
Notes to Physician:
Support cardiovascular and respiratory function.

Section 5 - FIRE FIGHTING MEASURES
  General Information:
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Vapors can travel to a source of ignition and flash back. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Reacts violently with water. Vapors may be heavier than air. They can spread along the ground and collect in low or confined areas. Contact with metals may evolve flammable hydrogen gas.
Extinguishing Media:
DO NOT USE WATER! Do NOT get water inside containers. For large fires, use water spray, fog or alcohol-resistant foam. For small fires, use carbon dioxide, dry chemical, dry sand, or alcohol-resistant foam. Cool containers with flooding quantities of water until well after fire is out.

Section 6 - ACCIDENTAL RELEASE MEASURES
  General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Absorb spill with inert material (e.g. vermiculite, sand or earth), then place in suitable container. Clean up spills immediately, observing precautions in the Protective Equipment section. Scoop up with a nonsparking tool, then place into a suitable container for disposal. Remove all sources of ignition. Do not expose spill to water. Do not get water inside containers.

Section 7 - HANDLING and STORAGE
  Handling:
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well-ventilated area. Use spark-proof tools and explosion proof equipment. Do not get in eyes, on skin, or on clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Take precautionary measures against static discharges. Do not ingest or inhale. Do not allow contact with water. Use only in a chemical fume hood. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Storage:
Keep away from sources of ignition. Store in a cool, dry place. Keep refrigerated. (Store below 4C/39F.) Store in a tightly closed container. Keep under a nitrogen blanket. Flammables-area. Do not store in metal containers.

Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
  Engineering Controls:
Use process enclosure, local exhaust ventilation, or other engineering controls to control airborne levels below recommended exposure limits. Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower.
Exposure Limits CAS# 75-78-5: Personal Protective Equipment Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166.
Skin:
Wear appropriate protective gloves to prevent skin exposure.
Clothing:
Wear a chemical apron. Wear appropriate protective clothing to prevent skin exposure.
Respirators:
Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or if irritation or other symptoms are experienced.

Section 9 - PHYSICAL AND CHEMICAL PROPERTIES
 
Physical State: Liquid
Color: clear, colorless
Odor: Pungent odor.
pH: Not available.
Vapor Pressure: 135 mm Hg @ 25 C
Viscosity: Not available.
Boiling Point: 70 deg C
Freezing/Melting Point: -16 deg C
Autoignition Temperature: 460 deg C ( 860.00 deg F)
Flash Point: -9 deg C ( 15.80 deg F)
Explosion Limits, lower: 5.5
Explosion Limits, upper: 10.4
Decomposition Temperature: Not available.
Solubility in water: Reacts with water.
Specific Gravity/Density: 1.064
Molecular Formula: C2H6Cl2Si
Molecular Weight: 129.0335

Section 10 - STABILITY AND REACTIVITY
  Chemical Stability:
Stable under normal temperatures and pressures.
Conditions to Avoid:
High temperatures, mechanical shock, incompatible materials, ignition sources, metals, exposure to moist air or water.
Incompatibilities with Other Materials:
Acids, alcohols, amines, strong bases, esters, ketones, aldehydes, acetone, ammonia, and strong oxidizing agents. Reacts violently with water to liberate an acidic gas which in contact with metal surfaces can generate flammable or explosive hydrogen gas.
Hazardous Decomposition Products:
Hydrogen chloride, chlorine, phosgene, carbon monoxide, irritating and toxic fumes and gases, carbon dioxide, silicon dioxide.
Hazardous Polymerization: Has not been reported

Section 11 - TOXICOLOGICAL INFORMATION
  RTECS#:
CAS# 75-78-5: VV3150000 LD50/LC50:
CAS# 75-78-5: Draize test, rabbit, eye: 5 mg/24H Severe; Draize test, rabbit, skin: 20 mg/24H Moderate; Inhalation, mouse: LC50 = 300 mg/m3/2H; Inhalation, rat: LC50 = 930 ppm/4H; Oral, rat: LD50 = 5660 uL/kg.
Oral, rat: LD50 = Carcinogenicity:
Dichlorodimethylsilane - Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.

Section 12 - ECOLOGICAL INFORMATION
  Ecotoxicity:
Water danger/protection: WGK 1 Aquatic toxicity range Tlm 96-100 ppm.
Dichlorodimethylsilane is not expected to persist long enough in the environment to bioconcentrate.

Section 13 - DISPOSAL CONSIDERATIONS
  Dispose of in a manner consistent with federal, state, and local regulations.

Section 14 - TRANSPORT INFORMATION
 
IATA
Shipping Name: DIMETHYLDICHLOROSILANE
Hazard Class: 3 (8)
UN Number: 1162
Packing Group: II
IMO
Shipping Name: DIMETHYLDICHLOROSILANE
Hazard Class: 3.2 (8)
UN Number: 1162
Packing Group: II
RID/ADR
Shipping Name: DIMETHYLDICHLOROSILANE
Hazard Class: 3
UN Number: 1162
Packing group: II

Section 15 - REGULATORY INFORMATION
 
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: F C
Risk Phrases:
R 12 Extremely flammable.
R 36/37/38 Irritating to eyes, respiratory system
and skin.
Safety Phrases:
S 16 Keep away from sources of ignition - No
smoking.
S 26 In case of contact with eyes, rinse immediately
with plenty of water and seek medical advice.
S 29 Do not empty into drains.
S 33 Take precautionary measures against static
discharges.
S 37/39 Wear suitable gloves and eye/face
protection.
WGK (Water Danger/Protection)
CAS# 75-78-5: No information available.
Canada
CAS# 75-78-5 is listed on Canada's DSL List.
CAS# 75-78-5 is listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 75-78-5 is listed on the TSCA inventory.


SECTION 16 - ADDITIONAL INFORMATION
N/A

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