Material Safety Data Sheet (MSDS): Phenyl Trimethicone

Identification

Product Name: Phenyl Trimethicone
Chemical Name: Trimethylsiloxyphenyl Dimethylsiloxysilicate
CAS Number: 70131-69-0
Synonyms: Trimethylsiloxyphenyl Dimethylpolysiloxane
Recommended Use: Additive in personal care products, cosmetics, hair conditioners, skin creams
Manufacturer: [Supplier Information]
Address: [Address of Manufacturer or Supplier]
Phone Number: [Emergency Contact Number]
Email: [Contact Email Address]
Emergency Telephone: CHEMTREC: 1-800-424-9300 (US)

Hazard Identification

GHS Classification: Not classified as hazardous under GHS standards
Label Elements: No signal word, pictogram, or hazard statements required
Hazard Statements: May cause mild skin or eye irritation in sensitive individuals
Precautionary Statements: Use with adequate ventilation, avoid contact with eyes
Other Hazards: Spilled product creates a slip hazard on hard surfaces; repeated skin contact could lead to dryness

Composition / Information on Ingredients

Chemical Identity: Phenyl Trimethicone
CAS Number: 70131-69-0
Concentration: 100% (pure form)
Impurities: No significant impurities contributing to classification

First Aid Measures

Inhalation: Move exposed individual outdoors, supply fresh air, seek medical attention for symptoms
Skin Contact: Remove contaminated clothing, wash skin with soap and water; use moisturizing lotion for dryness
Eye Contact: Rinse immediately with plenty of clean water, lift eyelids occasionally, seek medical attention if irritation persists
Ingestion: Rinse mouth thoroughly, drink water, seek medical attention if large amounts are ingested or discomfort occurs
Acute and Delayed Effects: Most people do not experience severe effects but repeated exposure may dry out skin or mildly irritate eyes
Advice for Medical Personnel: Treat symptomatically based on clinical judgment

Fire-Fighting Measures

Suitable Extinguishing Media: Water spray, carbon dioxide, foam, dry chemical
Unsuitable Extinguishing Media: Avoid direct water stream on burning product
Specific Hazards: Product can generate hazardous silicon oxides and carbon oxides when decomposed by fire
Protective Equipment: Firefighters need self-contained breathing apparatus and full protective gear
Special Procedures: Cool exposed containers with water mist; prevent runoff into drains and waterways

Accidental Release Measures

Personal Precautions: Wear protective gloves, eye protection, and non-slip footwear to reduce risk of falls
Environmental Precautions: Prevent contamination of soil and water by containing spills; avoid discharge into drains
Methods for Containment: Use sand, earth, or inert absorbent to contain the spill
Cleanup Procedures: Collect residue with suitable absorbent and transfer to labeled waste container; clean area thoroughly to remove residue

Handling and Storage

Safe Handling: Minimize unnecessary contact; avoid creating splashes or aerosols
Hygienic Practices: Wash hands before eating or smoking; remove contaminated clothing right away
Storage Requirements: Store in tightly closed original container in dry, well-ventilated area away from incompatible materials (strong oxidizers)
Temperature Tolerance: Avoid extreme heat and freezing conditions; maintain temperature between 5°C and 35°C
Specific Uses: Limited to industrial and professional application—follow product label for use cases

Exposure Controls and Personal Protection

Occupational Exposure Limits: No established limits for Phenyl Trimethicone; avoid unnecessary prolonged exposure
Engineering Controls: Ensure good ventilation, especially in enclosed areas
Personal Protective Equipment: Use impermeable gloves to prevent skin contact, safety goggles to protect eyes, and lab coats or protective aprons
Hygiene Measures: Clean up spills promptly; keep work area clean; do not eat or drink in the work area
Respiratory Protection: Not usually required under normal conditions; use NIOSH-approved mask if mist or aerosol generation becomes significant

Physical and Chemical Properties

Appearance: Clear, colorless, slightly viscous liquid
Odor: Mild, pleasant odor
Melting Point: Not applicable; remains liquid at room temperature
Boiling Point: >250°C
Flash Point: >260°C (closed cup)
Vapor Pressure: Negligible at 20°C
Specific Gravity: 0.98 to 1.02 (water = 1)
Solubility: Insoluble in water, soluble in organic solvents such as silicones or hydrocarbons
Viscosity: 10-300 cSt (varies with grade)
Explosive Properties: Not classed as explosive
Oxidizing Properties: Does not present oxidizing hazard

Stability and Reactivity

Chemical Stability: Stable under normal conditions of storage and handling
Reactivity: Not reactive under normal operating conditions
Conditions to Avoid: Excessive heat, open flames, oxidizing environments
Incompatible Materials: Strong acids, strong bases, powerful oxidizers
Hazardous Decomposition Products: Thermal breakdown may release small amounts of phenol, silicon oxides, and carbon oxides

Toxicological Information

Acute Toxicity: Low toxicity—not expected to cause acute health effects at standard exposure levels
Skin Contact: Repeated exposure may result in dryness or slight irritation
Eye Contact: Mild irritation possible, especially in sensitive individuals
Inhalation: Inhalation unlikely under normal use; aerosols or vapors from heated product could cause respiratory discomfort
Ingestion: Low risk in small quantities; swallowing large amounts could irritate gastrointestinal tract
Chronic Effects: No evidence of significant long-term health risks
Carcinogenicity, Mutagenicity, Reproductive Toxicity: Not classified for these endpoints

Ecological Information

Ecotoxicity: Not regarded as acutely toxic to aquatic life; may persist in environment due to low biodegradability
Persistence and Degradability: Product is chemically stable and degrades slowly; low volatility reduces air pollution risk
Bioaccumulation Potential: Low risk due to limited water solubility and mobility
Mobility in Soil: Expected to have low mobility owing to high hydrophobicity
Other Remarks: Avoid release to environment whenever possible; use responsible disposal methods

Disposal Considerations

Waste Treatment Methods: Dispose of in accordance with local, regional, and national regulations
Product Disposal: Incinerate in approved facilities or send to authorized chemical waste disposal service
Container Disposal: Empty containers fully, do not reuse, send to recycling or proper disposal site
Avoid: Discharging untreated product into waterways, drains, or soil

Transport Information

UN Number: Product not classified as dangerous for transport
Transport Hazard Class: Not regulated as hazardous material
Packing Group: Not assigned
Special Precautions: Secure containers to prevent leaks or spills during transport; avoid direct sunlight and extreme temperature changes during shipment
Environmental Hazards: Not listed as marine pollutant

Regulatory Information

OSHA Status: Not listed as hazardous chemical under United States OSHA Hazard Communication Standard
TSCA Inventory: Listed
EU Regulations (REACH): Listed; subject to general safety obligations
SARA Title III (Section 313): Not subject to reporting under this regulation
DSL (Canada): Listed
Other Information: Consult national, state, and local regulations for further compliance requirements