Product Name: Dimethicone
Synonyms: Polydimethylsiloxane, Silicone Oil
Chemical Formula: (C2H6OSi)n
CAS Number: 63148-62-9
Recommended Use: Personal care, cosmetics, lubricants, pharmaceuticals
Manufacturer Information: Contact available on company label
Emergency Contact Number: Refer to local regulations for poison control or company emergency hotline
Product Code: Assigned internally per manufacturer
Relevant Identified Uses: Emollient, water-repellent, antifoaming agent
Classification (GHS): Not classified as hazardous under OSHA Hazard Communication Standard
Label Elements: No pictogram required
Signal Word: None
Hazard Statements: No significant hazards identified
Precautionary Statements: Avoid prolonged eye contact; avoid inhaling mist or fumes during processing
Environmental Hazards: May cause effects in aquatic organisms when released in large volumes
Health Effects: Frequent skin exposure usually does not cause irritation
Special Precautions: Spilled oil increases risk of slipping
Chemical Name: Dimethicone
Synonyms: Silicone Oil
Concentration: 100% (unless diluted for specific use)
Impurities: None relevant at normal workplace concentrations
Additives: Occasionally contains trace stabilizers from manufacturing
Molecular Weight Range: Varies according to formulation (commonly 1,000–100,000 g/mol)
Eye Contact: Rinse cautiously with water for several minutes; remove contact lenses if present
Skin Contact: Wash with soap and water; unlikely to produce irritation
Inhalation: Remove person to fresh air; seek medical attention if symptoms develop from vapor exposure during heating
Ingestion: Rinse mouth with water; consult physician if large quantities are swallowed
Most Important Symptoms: No significant acute symptoms
Medical Attention/Advice: Treat symptomatically; no specific antidote
Suitable Extinguishing Media: Use dry chemical, foam, carbon dioxide, or water spray
Unsuitable Extinguishing Media: Avoid high pressure water stream which may spread burning material
Special Hazards: Burning can produce irritating or toxic fumes, including formaldehyde fumes
Personal Protective Equipment: Firefighters should wear self-contained breathing apparatus
Special Procedures: Cool containers with water spray to prevent pressure build-up and possible explosion
Personal Precautions: Wear protective gloves and safety glasses
Spill Response: Absorb liquid with inert material, such as sand or earth; shovel into containers for disposal
Environmental Precautions: Prevent further leakage or spillage; do not allow to enter drains or surface water
Clean-up Methods: Ventilate area; wash spill site after material pick-up
Special Equipment: Nonslip footwear recommended when cleaning up spills
Safe Handling Practices: Avoid inhalation of fumes; avoid contact with eyes; prevent prolonged skin contact during repeated use
Handling Temperature Recommendations: Keep below 40°C to avoid changes in viscosity
Storage Conditions: Store in tightly closed containers; keep in a dry, cool, well-ventilated location away from direct sunlight and incompatible materials such as strong oxidizers
Recommended Packaging Materials: Use containers made from steel, polyethylene, or other non-reactive materials
Incompatibilities: Strong acids, strong bases, oxidizing agents
Occupational Exposure Limits: No specific limit established
Engineering Controls: Ensure adequate ventilation in processing areas
Respiratory Protection: Not required under normal use; use NIOSH-approved respirators if heated to create mist or fumes
Hand Protection: Wear chemical-resistant gloves for extended handling
Eye Protection: Use safety goggles or face shield
Body Protection: Protective clothing if large quantities handled or risk of splashing
Hygiene Measures: Wash hands before breaks and after handling
Appearance: Clear to slightly hazy, colorless to slightly yellowish liquid
Odor: Odorless or very faint odor
pH: Not applicable
Melting Point/Freezing Point: Less than -50°C (varies with viscosity)
Boiling Point: Greater than 200°C
Flash Point: 300°C (closed cup)
Evaporation Rate: Negligible at room temperature
Flammability: Not easily ignited
Vapor Pressure: Very low at 25°C
Relative Density: 0.96 (water=1), can vary by grade
Solubility: Practically insoluble in water; soluble in most organic solvents
Partition Coefficient (n-octanol/water): High
Decomposition Temperature: Above 350°C
Viscosity: Ranges from 1 to 60,000 mPa•s depending on grade
Chemical Stability: Stable under normal temperatures and recommended storage conditions
Reactivity: Inert under most conditions
Hazardous Reactions: May form gases when in contact with strong acids or bases at elevated temperatures
Conditions to Avoid: Excessive heat, open flames, and ignition sources
Materials to Avoid: Strong oxidizers, acids, alkalis
Hazardous Decomposition Products: Thermal decomposition can release formaldehyde, silicon oxides, carbon oxides
Acute Toxicity: Essentially non-toxic, oral LD50 in rats exceeds 16,000 mg/kg
Skin Contact: Low potential for irritation; repeated long-term contact might occasionally cause dryness
Eye Contact: Mild, reversible irritation may happen
Inhalation: High vapor concentrations from heated product can cause mild respiratory irritation
Ingestion: Small amounts unlikely to cause harm
Chronic Toxicity: No chronic effects or sensitization observed in typical use
Carcinogenic Effects: No components considered carcinogenic by IARC, NTP, or OSHA
Mutagenicity: Not mutagenic
Reproductive Effects: No evidence found of reproductive toxicity
Ecotoxicity: Dimethicone is not acutely toxic to aquatic organisms in standard tests; large releases may impact sediment-dwelling species due to persistence
Persistence and Degradability: Not rapidly biodegradable; persists in environment
Bioaccumulative Potential: Not likely to bioaccumulate due to high molecular weight and low water solubility
Mobility in Soil: Low; binds strongly to soil particulate
Other Adverse Effects: No known long-term hazards at environmental concentrations found in consumer or industrial use
Waste Disposal Methods: Incinerate or dispose of in accordance with federal, state, and local environmental regulations
Unused Product: Transfer to approved waste handler
Contaminated Packaging: Empty containers may retain product residues; handle as chemical waste
Recycling: Where possible, send to approved recycler
Avoid Disposal: Do not discharge undiluted to sewer or surface water
UN Number: Not regulated as hazardous for transport
Proper Shipping Name: Dimethicone, Non-hazardous
Transport Hazard Class: Not applicable
Packing Group: Not applicable
Marine Pollutant: Not considered a marine pollutant
Special Precautions: Avoid leaks during shipment
Regulatory Details: Check country-specific rules for container labels and declarations
Inventory Status: Listed on US TSCA, EU EINECS, Canada DSL, Australia AICS, Japan ENCS
OSHA Hazard Communication: Not hazardous by criteria
SARA Section 313: Not subject
California Proposition 65: Not listed
WHMIS Classification: Not classified
Other Regulations: Meets FDA regulations for certain food and pharmaceutical uses where specified
Label Requirements: Follow workplace right-to-know provisions and safety labeling
Restrictions: See local, regional, and national controls for packaging or release limits
