Chemical Name: Dimethyl Silicone Oil
Common Names: Silicone Oil, Polydimethylsiloxane, PDMS
CAS Number: 63148-62-9
Manufacturer: Contact supplier or distributor for details
Recommended Use: Lubricant, antifoaming agent, electrical insulation, cosmetics, and pharmaceutical formulations
Restrictions: Industrial and laboratory use only, not intended for human consumption or direct contact
GHS Classification: Not classified as hazardous by OSHA Hazard Communication Standard
Signal Word: None
Hazard Statements: May cause mild, temporary eye irritation; no significant acute hazards in typical handling
Pictograms: None required
Precautionary Statements: Avoid direct or prolonged contact with eyes and mucous membranes
Other Hazards: Spilled oil may cause slip hazards on hard surfaces; vapor buildup can displace oxygen in confined spaces
Chemical: Polydimethylsiloxane
Content: 100% pure or blended grades
Impurities: Trace linear siloxanes, residual catalysts, water (<1%)
Molecular Structure: (C2H6OSi)n, repeating siloxane units
Inhalation: If exposed to aerosol or vapor, move to fresh air and rest; seek professional help for symptoms such as cough or shortness of breath
Skin Contact: Wipe off excess, wash with plenty of soap and water; persistent irritation signals the need for medical advice
Eye Contact: Rinse slowly with clean water for several minutes; contact ophthalmologist if irritation persists
Ingestion: Do not induce vomiting; rinse mouth and seek medical attention, especially if discomfort continues
Symptoms: Mild redness or dryness on skin, temporary blurred vision if splashed into eyes
Extinguishing Media: Use foam, dry chemical, or carbon dioxide
Unsuitable Media: Direct water stream may spread burning liquid
Hazards: Combustion produces formaldehyde, carbon monoxide, and silicon dioxide fumes
Protective Gear: Wear self-contained breathing apparatus and full protective suit
Advice for Firefighters: Remove containers if safe, cool with water spray from a safe distance, avoid inhaling fumes
Personal Protection: Wear gloves, goggles, and protective clothing to avoid skin or eye contact
Spill Response: Cover spill with non-combustible, inert absorbent (sand, earth), transfer to container for disposal
Cleanup: Clean residue with suitable solvent where permitted, ventilate area
Environmental Precautions: Prevent run-off into drains, sewers, and waterways
Disposal: Collect all waste for proper disposal according to local, state, and federal regulations
Handling Practices: Minimize repeated or prolonged exposure; wash hands thoroughly after use
Storage Conditions: Store in original, tightly closed containers in cool, dry, well-ventilated areas
Temperature Limits: Avoid extremes of heat above 60°C (140°F); protect from freezing
Compatibility: Keep away from strong acids, bases, and oxidizers
Avoidance: Do not eat, drink, or smoke where product is handled or stored
Engineering Controls: Use local exhaust ventilation for high temperature operations or aerosol generation
Personal Protective Equipment: Chemical-resistant gloves (nitrile or neoprene), safety glasses or splash goggles, laboratory coats
Respiratory Protection: Use NIOSH-approved respirators during spraying or at elevated temperatures
Exposure Limits: No OSHA or ACGIH exposure limits established; avoid repeated inhalation of mist
General Hygiene: Maintain strict personal hygiene, change contaminated clothing promptly
Appearance: Clear, colorless to pale yellow, oily liquid
Odor: Odorless or very faint
pH: Neutral
Boiling Point: Varies by viscosity, typical range 150–270°C (302–518°F)
Melting Point: -60°C to -40°C (-76°F to -40°F)
Flash Point: >300°C (>572°F), varies by grade
Evaporation Rate: Negligible
Vapor Pressure: <0.01 mmHg at 25°C
Solubility: Insoluble in water; soluble in many organic solvents
Viscosity: Ranges from 10 to 1,000,000 cSt, depending on grade
Specific Gravity: 0.96–0.98 (Water = 1)
Auto-Ignition Temperature: >400°C (752°F)
Partition Coefficient (n-octanol/water): High, due to non-polar structure
Chemical Stability: Stable under normal storage and handling
Conditions to Avoid: Heat, open flames, sources of ignition, strong oxidizing agents
Incompatible Materials: Avoid acids, bases, peroxides, and halogenated compounds
Decomposition: High temperatures yield formaldehyde, carbon oxides, and silicon dioxide
Hazardous Reactions: None under recommended storage and handling
Acute Toxicity: Low oral and dermal toxicity in animal studies
Skin Corrosion/Irritation: Not classified as irritating, but may cause mild skin dryness
Serious Eye Damage/Irritation: Mild, temporary irritation
Respiratory Sensitization: Mists or fumes may cause mild respiratory irritation upon chronic exposure
Chronic Effects: Long-term exposure has not shown significant health effects in research or workplace studies
Carcinogenicity: Not listed by IARC, NTP, or OSHA as a carcinogen
Mutagenicity and Reproductive Toxicity: No evidence found in animal or epidemiological studies
Ecotoxicity: Low acute toxicity to fish, daphnia, and aquatic microorganisms
Persistence: Chemically stable, resists biodegradation in the environment
Bioaccumulation: Potential for accumulation in sediments, limited uptake by aquatic life
Mobility: Insoluble in water, tends to settle in soil or sediment
Other Effects: High viscosity oils can form surface films reducing oxygen exchange if released in large volumes
Product Disposal: Incinerate in approved facility, recycle or reuse whenever possible
Container Disposal: Triple-rinse and recycle or send to approved landfill
Local Regulations: Follow state, federal, and municipal regulations on waste chemicals
Precaution: Do not pour into drains, watercourses, or soil
UN Number: Not classified as hazardous under transport regulations
Hazard Class: Non-hazardous
Packing Group: None
Proper Shipping Name: Silicone Oil, not regulated
Environmental Hazards: Avoid large spills during transport near aquatic environments
Transport Precautions: Secure containers to prevent accidental damage and leaks
OSHA Status: Not regulated as hazardous
TSCA: All ingredients listed
SARA Title III: Not subject to reporting under Sections 302, 304, 313
REACH: Polydimethylsiloxane registered
California Proposition 65: Not listed as a chemical known to cause cancer or reproductive harm
Other Regional Regulations: Confirm compliance with local, state, and international standards
