Product Name: Trisiloxane, 3-Ethenyl-1,1,1,3,5,5,5-Heptamethyl-
Chemical Formula: C11H28OSi3
Synonyms: Vinyl heptamethyl trisiloxane
Recommended Use: Industrial chemical, silicone intermediate
Supplier Identification: Manufacturer information with contact details including address, emergency phone, and intended chemical use
Emergency Phone Number: Local country Emergency Response Service and manufacturer’s emergency contact
Restrictions on Use: Do not use for personal care or medical applications without proper evaluation
Classification: Flammable liquids (Category 3); Skin irritation (Category 2); Eye irritation (Category 2); Hazardous to the aquatic environment (Category 3)
Label Elements: Signal word: Warning; Hazard statements: Flammable liquid and vapor, may cause skin and eye irritation, harmful to aquatic life with long lasting effects
Pictograms: Flame, exclamation mark, environment
Precautionary Statements: Keep away from heat and open flame; avoid breathing vapors, wash hands after handling; avoid release to the environment
Route of Exposure: Skin contact, eye contact, inhalation, ingestion
Target Organs: Eyes, skin, respiratory tract
Symptoms: Redness, itching, possible headache, dizziness from inhalation
Chemical Name: Trisiloxane, 3-Ethenyl-1,1,1,3,5,5,5-Heptamethyl-
CAS Number: 63148-56-1
Concentration: >98% (by weight)
Impurities/Additives: Trace methylsiloxanes, moisture (<1%)
Molecular Weight: 276.6 g/mol
Inhalation: Move affected person outdoors to fresh air; keep at rest; seek medical advice if symptoms persist
Skin Contact: Remove contaminated clothing; wash skin thoroughly with soap and water for at least 15 minutes
Eye Contact: Rinse with plenty of water for several minutes; remove contact lenses if present; continue rinsing and seek medical advice
Ingestion: Do not induce vomiting; rinse mouth with water; get medical attention
Immediate Medical Attention Needed: Seek advice for persistent symptoms, possible chemical burns, prolonged discomfort
Most Important Symptoms/Effects: Eye irritation, respiratory discomfort, skin dryness
Special Treatment: Symptomatic treatment as required
Suitable Extinguishing Media: Alcohol-resistant foam, dry chemical powder, CO2, water spray (do not use direct water jet)
Unsuitable Extinguishing Media: Direct water stream may spread fire
Hazards from Combustion: Carbon monoxide, carbon dioxide, silicon oxides, incompletely burned hydrocarbons
Protective Equipment for Firefighters: Full protective gear, self-contained breathing apparatus
Special Firefighting Procedures: Cool containers with water spray to prevent pressure buildup; prevent runoff from entering drains; evacuate area if heavy fire involvement
Explosion Hazard: Vapors may form explosive mixtures with air, particularly in unventilated spaces
Personal Protection: Avoid contact with skin, eyes, and clothing; use proper PPE including nitrile gloves, splash goggles, protective clothing
Environmental Precautions: Prevent spillage from entering drains, surface water, and soil; inform relevant local authorities if spill occurs
Cleanup Methods: Stop leak only if it can be done safely; contain spilled material using sand, earth, or inert absorbent; collect for disposal in suitable containers
Decontamination: Wash contaminated area with plenty of water after removal
Ventilation: Ensure good air circulation; remove ignition sources from affected area
Disposal of Collected Material: Dispose through licensed waste contractor in compliance with local guidelines
Safe Handling: Avoid inhaling vapors and direct contact with liquid; use in well-ventilated area; keep away from heat, sparks, and flames
Measures to Reduce Exposure: Do not handle near open flames or sources of ignition; ground all transferring and storage equipment
Safe Storage Conditions: Store in cool, dry, well-ventilated place; keep containers tightly closed and clearly labeled
Incompatible Materials: Strong acids, strong bases, oxidizing agents
Storage Temperature: Preferably below 35°C and above 0°C, avoid freezing and prolonged temperature extremes
Special Packaging Requirements: Use corrosion-resistant, sealed containers; secondary containment recommended for bulk storage
Engineering Controls: Install local exhaust ventilation or fume hoods where risk of vapor or aerosol exposure exists
Occupational Exposure Limits: No established TLV; use care to limit airborne exposure as low as reasonably achievable
Personal Protective Equipment: Chemical-resistant gloves (nitrile or butyl rubber), safety goggles, long-sleeved clothing, suitable footwear
Respiratory Protection: Approved organic vapor respirator if risk of exposure above ambient air limits
Hygiene Measures: Wash hands and face after handling; do not eat, drink, or smoke during use; remove contaminated clothing and wash before reuse
Special Controls: Use in chemical fume hood if available, particularly with quantities larger than laboratory scale
Appearance: Clear, colorless liquid
Odor: Mild characteristic, slightly sweet odor
Boiling Point: About 198–201°C (388–394°F)
Melting Point: Below -50°C (-58°F)
Flash Point: 65°C (closed cup)
Auto-ignition Temperature: Above 260°C
Vapor Pressure: <1 mm Hg at 25°C
Vapor Density: Heavier than air
Solubility in Water: Very low, practically insoluble
Partition Coefficient (log Kow): Estimated >4
Density: About 0.83–0.87 g/cm3 at 25°C
Viscosity: 2–10 cSt (at 25°C)
pH: Not applicable
Evaporation Rate: Slow
Chemical Stability: Stable under normal storage and handling conditions
Conditions to Avoid: Contact with strong acids, alkalis, oxidizers; excess heat, open flames, sparks
Possibility of Hazardous Reactions: May react with strong oxidizing agents causing risk of fire
Hazardous Decomposition Products: Silicon oxides, formaldehyde at high temperatures, carbon oxides
Polymerization: Unlikely under recommended conditions
Incompatibility: Strong acids, strong bases, fluorine compounds
Corrosion: Non-corrosive to most metals but can degrade some plastics and elastomers
Acute Toxicity: Low oral and dermal toxicity, estimated LD50 (oral, rat) > 5,000 mg/kg, LD50 (dermal, rabbit) > 2,000 mg/kg
Skin Corrosion/Irritation: May cause mild irritation with prolonged or repeated contact
Eye Damage/Irritation: Moderate irritation possible
Respiratory Sensitization: May cause coughing or mild respiratory discomfort if inhaled
Chronic Toxicity: Repeated exposure can cause dryness, cracking of skin
Mutagenicity/Carcinogenicity: Not classified as mutagenic or carcinogenic based on available data
Other Effects: No significant evidence of reproductive toxicity, developmental toxicity
Routes of Exposure: Oral, skin contact, inhalation
Ecotoxicity: Harmful to aquatic life with long-lasting effects; estimated LC50 (fish, 96h) >10 mg/L
Persistence and Degradability: Not readily biodegradable, persists in the environment
Bioaccumulation: Potential to bioaccumulate in aquatic organisms, high partition coefficient
Mobility in Soil: Low solubility and mobility, likely to absorb strongly to soil particles
Other Adverse Effects: Disrupts surface tension in water, alters surface properties of soil and sediment
Precautions: Prevent product, residue, or contaminated water from entering soil, waterways, and drains
Waste Disposal Methods: Incinerate in approved facility; do not dispose to landfill or sewer; follow local regulations
Container Disposal: Wash and recycle if possible, otherwise dispose as hazardous waste
Precautions for Disposal: Avoid discharge to surface water, drains, or open environment
Regulatory Requirements: Follow national and local environmental disposal regulations; agents approved for hazardous chemical collection
Contaminated Packaging: Rinse thoroughly, remove all residues safely
UN Number: UN 1993
Proper Shipping Name: Flammable liquid, n.o.s. (Trisiloxane, 3-Ethenyl-1,1,1,3,5,5,5-Heptamethyl-)
Transport Hazard Class: 3 (Flammable liquid)
Packing Group: III
Labels Required: Flammable liquid
Special Precautions: Transport in upright sealed containers; keep away from ignition sources; ensure correct labeling at all transit stages
Environmental Hazards: Dangerous to aquatic environment in case of industrial-scale spills
Regulatory Transport Codes: Complies with ADR/RID, IATA/ICAO, IMDG regulations
Labelling According to EU Regulations: CLP Regulation (EC) No 1272/2008 (GHS)
TSCA Inventory: Listed or exempt
REACH Registration: Registered or pre-registered by manufacturer
OSHA Hazcom 2012 Classification: Flammable, acute toxicity, skin/eye irritant
RoHS/ELV Status: Not restricted
Other Chemical Control Laws: Complies with local, national, and international environmental safety, worker safety, and transport regulations
Special Restrictions: Restricted for manufacture, sale, or use in some jurisdictions; check applicable approvals
SDS Revision Date: Current as of June 2024 or manufacturer update
