Product Name: Phenyl Hydrogen Silicone Oil
Chemical Family: Organosiloxane
Chemical Formula: Variable depending on polymer length; includes Si-H and phenyl groups
CAS Number: Varies, often starts with 63148-57-2
Recommended Use: Used as a modifier in silicone formulations, water repellents, and specialty coatings
Supplier Details: Manufacturer’s name, address, and emergency contact number required on the label and SDS
Emergency Phone: Available 24 hours for accidents or significant exposure
Other Identifiers: Synonyms may include methylphenyl hydrogen polysiloxane, phenylmethylsilicone
GHS Classification: Eye and skin irritant, non-flammable under most handling conditions, not classified as acutely toxic
Signal Word: Warning
Hazard Statements: Causes mild skin and eye irritation, may cause respiratory discomfort in sensitive individuals, can cause an oily film on floors leading to slip hazard
Precautionary Statements: Avoid direct contact with skin and eyes, wash hands thoroughly after handling, wear proper protection
Label Elements: Exclamation mark symbol on the label for irritant properties
Other Hazards: Heating to decomposition can release toxic fumes such as formaldehyde and silicon oxides
Environmental Impact: Not classified as hazardous to the aquatic environment but can contribute to surface water sheening
Main Ingredient: Phenylmethyl hydrogen polysiloxane
Concentration: Typically between 90–100% by weight
Impurities: Trace siloxane oligomers, possible residual reactants and catalyst leftovers
Additives: Often none added deliberately, but stabilizers and inhibitors may be present in small tracer amounts
CAS Numbers: Base polymer (63148-57-2), minor impurities may have their own CAS listings
Inhalation: Move person to fresh air, keep comfortable, and seek medical advice if symptoms develop; exposure rarely causes severe reactions but can irritate sensitive airways
Skin Contact: Wash thoroughly with soap and water; remove contaminated clothing and launder before reuse
Eye Contact: Immediately rinse with plenty of clean water for several minutes; remove contact lenses if present and easy to do; medical attention for persistent irritation
Ingestion: Do not induce vomiting; rinse mouth thoroughly; seek medical attention for discomfort or if large amount swallowed
Advice to Physician: Treat symptomatically, monitor for allergic or irritant reactions
Suitable Extinguishing Media: Use foam, dry powder, or carbon dioxide for large spills; water spray for small fires but not as a stream
Specific Hazards: Product does not burn easily but combustion releases irritating and toxic gases such as carbon monoxide, silicon dioxide, and formaldehyde
Protective Equipment: Firefighters should use self-contained breathing apparatus and protective gear for structural fires
Special Procedures: Cool containers with water spray, prevent run-off from entering sewers or watercourses
Combustion Byproducts: Includes silicon oxides, carbon oxides, incomplete combustion can lead to formaldehyde formation
Personal Precautions: Wear suitable protective clothing including gloves and goggles
Spill Cleanup: Absorb liquid with inert material (sand, earth, vermiculite) and collect for disposal using tools minimizing skin contact
Environmental Precautions: Prevent entry into waterways, sewers, or confined spaces; diking may help contain larger quantities
Clean-up Procedure: Use non-sparking tools and collect in a labeled waste container for proper disposal
Decontamination: Wash contaminated floor area with detergent and plenty of water
Handling: Minimize direct exposure, wear proper gloves and avoid inhalation of vapors or mist; avoid generating splashes or aerosol
Storage Conditions: Keep in tightly closed original packaging in a cool, dry, well-ventilated area
Incompatibilities: Store away from strong oxidizers, acids, and amines; avoid sources of heat or ignition
Hygiene Practice: Avoid eating, drinking, or smoking during use, thoroughly wash hands after handling
Container Materials: Store only in containers approved for organosiloxane substances to prevent reaction or leakage
Exposure Limits: No established occupational exposure limits for this compound in the US or EU, minimize airborne mist or vapor
Engineering Controls: Use local exhaust or general ventilation to maintain airborne levels as low as possible
Personal Protective Equipment: Wear impervious gloves, chemical splash goggles, and protective clothing; for significant contamination, use respiratory protection with organic vapor/particulate filter
Environmental Controls: Prevent workplace release and maintain good housekeeping to reduce slip hazards from spilled liquids
Appearance: Clear, colorless to pale yellow liquid; viscous and slick to the touch
Odor: Mild, sometimes sweet silicon odor
pH: Not applicable (non-aqueous, neutral)
Melting Point: Below -50ºC depending on grade
Boiling Point: Typically over 200°C, varies by polymer length
Flash Point: Usually above 150°C, check specific SDS for exact data
Evaporation Rate: Negligible at ambient conditions
Solubility: Insoluble in water; soluble in most organic solvents
Vapor Pressure: Low at room temperature
Density: About 0.98–1.02 g/cm³
Viscosity: Wide range, commonly 50–1000 cSt
Partition Coefficient: High log Kow, suggests low water solubility and potential accumulation in organic phases
Chemical Stability: Stable under recommended storage and use conditions
Reactivity: Does not react with most materials under ambient conditions
Hazardous Reactions: Exothermic reactions possible with strong oxidizing agents, acids, and bases
Hazardous Decomposition: Silicon oxides, carbon oxides, and low levels of formaldehyde if overheated or combusted
Conditions to Avoid: Heat, open flame, sources of ignition, prolonged exposure to sunlight
Incompatible Materials: Strong acids, alkalis, oxidizers, and amines
Acute Toxicity: Not classified as acutely toxic by oral, dermal, or inhalation exposure in animal studies
Skin Irritation: Can produce mild to moderate irritation with prolonged contact
Eye Irritation: May cause mild to moderate irritation on direct exposure
Respiratory Tract: Vapor or mist may irritate nose, throat, and lungs, especially at elevated temperatures
Chronic Exposure: Chronic or repeated exposure unlikely to produce serious systemic harm but may lead to dry skin
Carcinogenicity: Not classified as carcinogen by IARC, NTP, OSHA, or EU agencies
Mutagenicity/Reproductive Toxicity: No evidence of mutagenic or reproductive effects in available studies
Persistence: Silicone polymer structure resists breakdown in the environment, remains stable for years
Bioaccumulation: High log Kow indicates possible accumulation in biological tissues, though actual uptake is limited by molecule size
Aquatic Toxicity: Low toxicity to aquatic organisms in short-term studies but oil film can block air exchange and harm surface-dwelling organisms
Mobility: Non-volatile, low mobility in soil, likely to adsorb to sediments
Degradability: Not readily biodegradable, likely to persist in both soil and surface environments
Product Disposal: Dispose in accordance with local, regional, and national regulations; never release to waterways or municipal drains
Container Disposal: Empty containers may retain residues; triple-rinse and follow community hazardous waste protocols
Recommended Methods: Incineration at licensed facility suited for organic silicon compounds, avoid landfill if possible
Recycling: Recycle containers when feasible after proper cleaning, but consider contamination risk
UN Number: Not regulated as hazardous under major UN, US DOT, or EU ADR transport codes
Proper Shipping Name: Not regulated; generic product transport descriptions apply
Hazard Class: Not assigned under current guidelines
Packing Group: Not applicable
Environmental Hazards: Not classified as marine pollutant, yet care required to prevent release during transit
Transport Precautions: Secure containers to prevent leaks or spills, avoid overstacking or exposure to heat and sunlight during shipping
OSHA: Not regulated as a hazardous substance under the Hazard Communication Standard
TSCA: Main polymer often listed on the US Toxic Substances Control Act Inventory
REACH: Preregistered substances under the EU REACH Regulation, some forms subject to registration or restrictions
SARA/Title III: Not listed as Extremely Hazardous Substance; not subject to Section 313 reporting
California Prop 65: Contains no chemicals known to the State of California to cause cancer, birth defects, or reproductive harm
Other Regulations: Check local or international requirements for workplace notification and hazard signage; safety data sheets update recommendations every 3–5 years or with significant regulatory change
