2504-64-5
CAS Number

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Section II.Composition and Information on Ingredients
Chemical NameCAS Number Percent (%)TLV/PELToxicology Data
1,2-Bis(trichlorosilyl)ethane2504-64-5Min. 95.0 (T) Not available.Not available.

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Section III. Hazards Identification
Corrosive to skin, eyes, and respiratory system. Liquid or spray mist may produce tissue damage, particularly in mucous
Acute Health Effects
membranes of the eyes, mouth and respiratory tract. Skin contact may produce burns. Eye contact can result in corneal
damage or blindness. Inhalation of the spray mist may produce severe irritation of respiratory tract, characterized by
coughing, choking, or shortness of breath. Corrosive materials may cause serious injury if ingested.
Follow safe industrial hygiene practices and always wear proper protective equipment when handling this compound.
CARCINOGENIC EFFECTS : Not available.
Chronic Health Effects
MUTAGENIC EFFECTS : Not available.
TERATOGENIC EFFECTS : Not available.
DEVELOPMENTAL TOXICITY: Not available.
Repeated or prolonged contact with spray mist may produce chronic eye irritation and severe skin irritation. Repeated or
prolonged exposure to spray mist may produce respiratory tract irritation leading to frequent attacks of bronchial infection.

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Section IV.First Aid Measures
Eye ContactCheck for and remove any contact lenses. In case of contact, immediately flush eyes with plenty of water for at least 15
minutes. Get medical attention.
Skin ContactIn case of contact, immediately flush skin with plenty of water. Remove contaminated clothing and shoes. Wash clothing
before reuse. Thoroughly clean shoes before reuse. Get medical attention.
InhalationIf the victim is not breathing, perform mouth-to-mouth resuscitation. Loosen tight clothing such as a collar, tie, belt or
waistband. If breathing is difficult, oxygen can be administered. Seek medical attention if respiration problems do not
improve.
IngestionDO NOT INDUCE VOMITING. Loosen tight clothing such as a collar, tie, belt or waistband. If the victim is not breathing,
perform mouth-to-mouth resuscitation. Examine the lips and mouth to ascertain whether the tissues are damaged, a possible
indication that the toxic material was ingested; the absence of such signs, however, is not conclusive.

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Section V.Fire and Explosion Data
200°C (392°F)
Auto-Ignition
FlammabilityMay be combustible at high temperature.
Flammable LimitsNot available.
Flash Points78°C (172.4°F).
Combustion ProductsThese products are toxic carbon oxides (CO, CO2), halogenated compounds. Silicates.
WARNING: Highly toxic HCl gas is produced during combustion.
Fire HazardsNot available.
Risks of explosion of the product in presence of mechanical impact: Not available.
Explosion Hazards
Risks of explosion of the product in presence of static discharge: Not available.
Fire Fighting MediaSMALL FIRE: Use DRY chemical powder.
and InstructionsLARGE FIRE: Use water spray, fog or foam. DO NOT use water jet.
Consult with local fire authorities before attempting large scale fire-fighting operations.
Continued on Next Page
1,2-Bis(trichlorosilyl)ethane

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Section VI.Accidental Release Measures
Spill CleanupCorrosive material. Moisture sensitive material.
Stop leak if without risk. If the product is in its solid form: Use a shovel to put the material into a convenient waste disposal
Instructions
container. If the product is in its liquid form: Absorb with DRY earth, sand or other non-combustible material. DO NOT get
water inside container. Absorb with an inert material and put the spilled material in an appropriate waste disposal. DO NOT
touch spilled material. Use water spray curtain to divert vapor drift. Prevent entry into sewers, basements or confined areas;
dike if needed. Eliminate all sources of ignition. Consult federal, state, and/or local authorities for assistance on disposal.

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Section VII. Handling and Storage
CORROSIVE. MOISTURE SENSITIVE. HANDLE AND STORE UNDER ARGON. Keep container dry. Keep away from
Handling and Storage
heat. Mechanical exhaust required. When not in use, tightly seal the container and store in a dry, cool place. Avoid
Information
excessive heat and light. Do not breathe gas/fumes/ vapor/spray. Never add water to this product. Wear suitable protective
clothing. If you feel unwell, seek medical attention and show the label when possible. Treat symptomatically and
supportively.
Always store away from incompatible compounds such as oxidizing agents, moisture.

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Section VIII. Exposure Controls/Personal Protection
Provide exhaust ventilation or other engineering controls to keep the airborne concentrations of vapors below their respective
Engineering Controls
threshold limit value. Ensure that eyewash station and safety shower is proximal to the work-station location.
Face shield. Lab coat. Dust respirator. Boots. Gloves. Suggested protective clothing might not be sufficient; consult a
Personal Protection
specialist BEFORE handling this product. Be sure to use a MSHA/NIOSH approved respirator or equivalent.
Not available.
Exposure Limits

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Section IX. Physical and Chemical Properties
Physical state @ 20°CLiquid. (White, lumps.)Solubility
Not available.
1.483 (water=1)
Specific Gravity
Molecular Weight296.94Partition CoefficientNot available.
Boiling PointNot available.Vapor Pressure<0.13 kPa (@ 25°C)
28°C (82.4°F) (freezing point)Not available.
Melting PointVapor Density
Refractive IndexNot available.VolatilityNot available.
Not available.Not available.
Critical TemperatureOdor
Not available.Not available.
ViscosityTaste

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Section X.Stability and Reactivity Data

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This material is stable if stored under proper conditions. (See Section VII for instructions)
Stability
Conditions of InstabilityAvoid excessive heat and light. Moisture sensitive.
Incompatibilities
Reactive with strong oxidizing agents, moisture.

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Section XI. Toxicological Information
Not available.
RTECS Number
Eye Contact. Ingestion. Inhalation. Skin contact.
Routes of Exposure
Not available.
Toxicity Data
Chronic Toxic EffectsCARCINOGENIC EFFECTS : Not available.
MUTAGENIC EFFECTS : Not available.
TERATOGENIC EFFECTS : Not available.
DEVELOPMENTAL TOXICITY: Not available.
Repeated or prolonged contact with spray mist may produce chronic eye irritation and severe skin irritation. Repeated or
prolonged exposure to spray mist may produce respiratory tract irritation leading to frequent attacks of bronchial infection.
Acute Toxic EffectsCorrosive to skin, eyes, and respiratory system. Liquid or spray mist may produce tissue damage, particularly in mucous
membranes of the eyes, mouth and respiratory tract. Skin contact may produce burns. Eye contact can result in corneal
damage or blindness. Inhalation of the spray mist may produce severe irritation of respiratory tract, characterized by
coughing, choking, or shortness of breath. Corrosive materials may cause serious injury if ingested.
Follow safe industrial hygiene practices and always wear proper protective equipment when handling this compound.
Continued on Next Page
1,2-Bis(trichlorosilyl)ethane

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Section XII.Ecological Information
EcotoxicityNot available.
Not available.
Environmental Fate

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Section XIII. Disposal Considerations
Recycle to process, if possible. Consult your local regional authorities. You may be able to dissolve or mix material with a
Waste Disposal
combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber system. Observe all
federal, state and local regulations when disposing of the substance.

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Section XIV. Transport Information
DOT ClassificationDOT Class 8: Corrosive material
PIN Number
Proper Shipping NameChlorosilanes, corrosive, n.o.s.
II
Packing Group (PG)
DOT Pictograms

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Section XV. Other Regulatory Information and Pictograms
TSCA Chemical InventoryThis compound is ON the EPA Toxic Substances Control Act (TSCA) inventory list.
(EPA)
WHMIS ClassificationCLASS E: Corrosive liquid.
On NDSL
(Canada)
EINECS Number (EEC) 219-710-9
EEC Risk StatementsR34- Causes burns.

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SECTION 16 - ADDITIONAL INFORMATION
N/A