Product Name: Trimethylsiloxysilicate
Chemical Family: Organosilicon compound
CAS Number: 63148-62-9
Recommended Use: Film-forming agent, binder in coatings, cosmetics, elastomers
Manufacturer: Provided by chemical supplier
Emergency Telephone: Local poison control or manufacturer’s emergency line
Molecular Formula: (C3H9OSi)nSiO2
Synonyms: Poly(trimethylsiloxy)silicate, Silicon resin
Address: Provided by supplier
Email Contact: Reach out through supplier information line
Classification (GHS): Not classified as hazardous under GHS for normal conditions of use
Physical Hazards: Dust or vapor may be generated if handled improperly
Health Hazards: May cause mild skin or eye irritation; inhalation can irritate respiratory tract
Environmental Hazards: Non-biodegradable; potential hazard if released in significant quantity
Label Elements: Low hazard pictogram, avoid inhaling dust, use proper ventilation
Signal Word: None required by GHS
Hazard Statements: Can irritate eyes and skin after direct contact; large releases might contaminate soil or waterways
Precautionary Statements: Wear gloves, use splash-proof goggles; work in ventilated area
Chemical Identity: Trimethylsiloxysilicate
Concentration: Greater than 95%
Other Components: May contain trace linear siloxanes, silicone oil less than 2%, residual solvent below 1%
Impurities: No carcinogenic impurities listed above threshold levels; volatile organic compounds generally below 1%
CAS Number: 63148-62-9
EC Number: Polymer; not listed
Inhalation: Move affected person to fresh air; allow rest in comfortable position; get medical advice if breathing becomes difficult
Skin Contact: Rinse skin with soap and plenty of water; remove contaminated clothing; get medical help for persistent redness or irritation
Eye Contact: Immediately flush eyes with running water for at least 15 minutes; remove contact lenses; seek further medical attention if irritation continues
Ingestion: Rinse mouth thoroughly; drink water if conscious; do not induce vomiting; get medical advice if large amount swallowed
Notes to Doctor: Treat symptoms; no antidote known; monitor airway, breathing, and circulation
Extinguishing Media: Use dry chemical, CO2, foam, or water spray; avoid direct water jets
Special Hazards: Burning releases carbon oxides, silicon oxides, and possible formaldehyde
Protective Equipment: Firefighters use self-contained breathing apparatus and full protective gear
Firefighting Instructions: Prevent run-off from entering drains or watercourses; cool containers at risk with water spray
Explosion Data: Not sensitive to static discharge or mechanical impact under normal usage
Personal Precautions: Avoid dust production; ventilate area; use respirator if dusting occurs
Environmental Precautions: Prevent material from entering waterways, storm drains, or soil; collect spillage using absorbent material such as sand or vermiculite
Methods for Containment: Stop leak if safe; collect spilled substance in suitable, labeled container
Cleanup Methods: Wash residue from area with soap and water; dispose of contaminated material according to local regulations
Reference to Sections: Refer to guidance in sections on exposure control and PPE
Handling: Handle in well-ventilated area; avoid breathing vapor or dust; avoid contact with skin and eyes; wear proper PPE when decanting or mixing
Storage Conditions: Store in tightly closed original containers; keep in a cool, dry, well-ventilated area; protect from sunlight and incompatible materials
Incompatibilities: Strong oxidizers, acids, bases above pH 12 can degrade product; avoid storing near foodstuffs
Special Packaging Requirements: Use containers made of stainless steel, glass, HDPE; keep away from high humidity
Hygiene Measures: Wash exposed skin after handling; do not eat, drink, or smoke in working area
Exposure Limits: Occupational limits not established for this polymer; control dust below nuisance levels (e.g. ACGIH TLV Total Dust 10 mg/m3)
Engineering Controls: Work in local exhaust or ventilated hood; maintain negative pressure if working with powders
Personal Protection: Chemical-resistant gloves (nitrile, neoprene); safety glasses or goggles; dust mask or respirator for dusty operations; chemical apron for bulk handlers
Environmental Controls: Ensure spills do not reach water, soil, or drains
Workplace Monitoring: Monitor airborne concentrations if dust may be generated
Appearance: Clear to slightly hazy colorless or pale-yellow liquid; sometimes supplied as resinous solid
Odor: Slight, characteristic silicone-like scent
Odor Threshold: Not determined
pH: Not applicable (non-aqueous)
Melting/Freezing Point: Below -50°C (liquid forms), resin may soften around 70°C
Boiling Point/Range: Decomposes above 200°C
Flash Point: Above 100°C (closed cup, liquid); solid forms are not flammable
Evaporation Rate: Negligible (non-volatile polymer)
Flammability: Unlikely to catch fire under standard conditions
Explosive Properties: No explosive components
Vapor Pressure: Below 1 Pa at 20°C
Vapor Density: Not applicable
Relative Density: About 1.1 - 1.3 g/cm3 (at 25°C)
Solubility: Insoluble in water; soluble in many organic solvents such as ethanol, toluene, and hexane
Partition Coefficient (log Kow): High (estimated above 6, due to hydrophobic siloxane chain)
Auto-ignition Temperature: Above 400°C (estimated)
Decomposition Temperature: Greater than 250°C (yields formaldehyde and silicon oxides)
Viscosity: Varies with specific grade, ranges from 20 to 2000 mPa·s (liquid)
Chemical Stability: Stable under normal, recommended storage and handling
Reactivity: Non-reactive to moisture; unreactive with common materials in workplace
Hazardous Reactions: Can degrade upon strong heating, or with strong bases/acids yielding silanols and low molecular weight siloxanes
Hazardous Decomposition Products: Methane, formaldehyde, carbon monoxide, silicon oxides if burned
Conditions to Avoid: Prolonged heating above 200°C; strong acids or bases; sunlight may slowly degrade
Incompatible Materials: Avoid mixing with concentrated nitric acid, strong oxidizers, concentrated bases
Polymerization: Will not occur spontaneously
Acute Toxicity: Oral, dermal, and inhalation routes show very low toxicity in animal studies (LD50 greater than 5000 mg/kg, rat)
Skin Corrosion/Irritation: Mild to non-irritating in standard tests
Serious Eye Damage/Irritation: Slight, transient irritation possible after direct contact
Respiratory/Skin Sensitization: No sensitization documented in occupational or experimental settings
Chronic Toxicity: No reproductive, germ cell mutagenicity, or carcinogenicity observed in available studies
Target Organs: No evidence for target organ effects from routine human use
Experience with Humans: Occasional mild skin and eye complaints in cosmetic users
Additional Information: Migration through skin unlikely because of high molecular weight
Toxicity to Aquatic Life: Not expected to cause acute harm to aquatic species based on structure and testing with comparable silicones; LC50 >100 mg/L (fish, 96h)
Persistence and Degradability: Highly stable, non-biodegradable in water or soil
Bioaccumulation Potential: Moderate to high, due to hydrophobicity and molecular size
Mobility in Soil: Strongly adsorbs to organic matter; unlikely to leach to groundwater
Other Adverse Effects: Can persist for years if released in quantity; large-scale discharges might cover surfaces and affect plant or animal gas exchange
Wastewater Impact: Can cause fouling of equipment if present in high concentrations
Waste Disposal Methods: Gather and place in tightly sealed chemical waste drums; suitable for incineration in approved facility with flue gas scrubbers
Packaging Disposal: Empty containers retain residue; decontaminate or triple-rinse before authorized disposal
Special Precautions: Do not discharge into sewers or surface water
Regulatory Advice: Comply with national and local waste disposal regulations; refer to product-specific regulatory codes
Reuse/Recycling: Not practical in most cases
UN Number: Not regulated under most international transport codes
UN Proper Shipping Name: Not classified as dangerous for air, sea, road or rail transport
Transport Hazard Class: None assigned
Packing Group: None
Environmental Hazards: Non-marine pollutant
Special Transport Precautions: Keep containers tightly sealed, mount securely to prevent movement; avoid excessive heat
Transport by Bulk (Annex II, MARPOL 73/78): Not listed
Emergency Response Guide: General chemical spill procedures
TSCA (USA): Listed or compliant
REACH (EU): Exempt as a polymer, not subject to registration
DSL (Canada): Listed
AICS (Australia): Listed
EINECS/ELINCS: Not listed – polymer exempt
Other Regulations: Not subject to specific workplace restrictions; satisfies cosmetic and food-contact standards in several regions if product purity is verified
Labeling Requirements: Follow GHS labeling for physical irritant
Inventory Status: Registered in major chemical inventories worldwide
