Product Name: Methylphenyldiethoxysilane
Chemical Formula: C12H20O2Si
CAS Number: 3027-21-2
Synonyms: Diethoxy(methyl)phenylsilane
Manufacturer: Refer to supplier documentation
Relevant Uses: Intermediate for silicone synthesis, specialty coatings, surface treatment
Contact Points: Emergency telephone, technical service details provided by manufacturer
GHS Classification: Flammable Liquids (Category 3), Acute Toxicity (Oral, Category 4), Eye Irritation (Category 2A)
Pictograms: Flame, Exclamation Mark
Signal Word: Warning
Hazard Statements: May cause skin and eye irritation, flammable liquid and vapor, harmful if swallowed
Precautionary Statements: Keep away from open flames, avoid contact with skin and eyes, wear appropriate protective equipment
Routes of Exposure: Inhalation, ingestion, skin, eyes
Target Organs: Central nervous system, liver, kidneys
Chemical Name: Methylphenyldiethoxysilane
Concentration: 98-100% by weight
Impurities/Additives: Trace siloxanes, ethanol (potential byproduct on hydrolysis)
EC Number: 221-128-6
Molecular Structure: Si center with two ethoxy, one methyl, and one phenyl group
Inhalation: Move person to fresh air, support breathing, seek medical attention if symptoms persist
Skin Contact: Remove contaminated clothing, wash affected area with soap and water, consult healthcare if irritation remains
Eye Contact: Flush with clean running water for at least 15 minutes, remove contact lenses if present, seek medical care for persistent discomfort
Ingestion: Rinse mouth thoroughly, do not induce vomiting, contact emergency medical services promptly
Symptoms: Headache, nausea, respiratory discomfort, skin redness, eye watering
Suitable Extinguishing Media: Carbon dioxide, dry chemical, alcohol-resistant foam
Unsuitable Media: High-pressure water streams
Hazards from Combustion: Emits toxic fumes of silicon oxides, carbon monoxide, carbon dioxide
Protective Equipment: Full protective gear, self-contained breathing apparatus recommended
Firefighting Procedures: Isolate area, cool adjacent containers with water spray, prevent runoff into sewers
Spill Response: Evacuate area, eliminate ignition sources, ventilate
Containment: Prevent release to drains, use inert absorbent material
Personal Protection: Wear gloves, goggles, suitable clothing, use appropriate respiratory protection for vapor
Cleanup: Gather residues with non-sparking tools, dispose in accordance with local regulations
Notification: Inform appropriate environmental or workplace health authorities
Handling: Use only in well-ventilated areas, keep away from heat and open flame, avoid inhalation and skin contact
Storage Conditions: Store in tightly sealed containers, keep in cool, dry, and well-ventilated place, segregate from incompatible materials
Incompatibilities: Strong oxidizing agents, acids, moisture
Engineering Measures: Use explosion-proof equipment and non-sparking tools
Engineering Controls: Local exhaust ventilation, general ventilation
Exposure Limits: Not established for this substance; control as for solvents
Respiratory Protection: Approved organic vapor respirators in case of inadequate ventilation
Hand Protection: Chemical-resistant gloves such as nitrile or neoprene
Eye Protection: Chemical safety goggles
Skin Protection: Long-sleeved clothing, lab coat or apron
Hygiene Measures: Wash hands after handling, keep food away from work area
Appearance: Clear, colorless to pale yellow liquid
Odor: Slight, characteristic
Boiling Point: 240-250 °C
Melting Point: Not applicable, remains liquid at room temperature
Flash Point: Approximately 85-95 °C (closed cup)
Vapor Pressure: Low at ambient temperature
Solubility: Not miscible with water, soluble in organic solvents (e.g., ethanol, toluene)
Density: About 0.98-1.00 g/cm3 at 20°C
Viscosity: Low viscosity
pH: Not measurable as a non-aqueous compound
Chemical Stability: Stable under normal ambient and storage conditions
Hazardous Reactions: Hydrolyzes in presence of moisture, producing ethanol
Incompatible Materials: Water, strong oxidizers, acids, alkalis
Decomposition Products: Silicon oxides, hydrocarbons, ethanol
Polymerization: Not expected under normal conditions
Acute Toxicity: LD50 (oral, rat): estimated 1,000-2,000 mg/kg
Routes of Exposure: Ingestion, inhalation, dermal, ocular
Corrosivity/Irritation: May cause eye, skin, and respiratory tract irritation
Chronic Effects: No data on long-term impacts in humans, but repeated exposure may produce target organ effects
Carcinogenicity: Not classified as carcinogen by NTP, IARC, or OSHA
Reproductive/Developmental: No evidence of reproductive toxic effects
Symptoms: Headaches, dizziness, nausea
Ecotoxicity: Low to moderate aquatic toxicity anticipated, specific data limited
Persistence and Degradability: Expected to degrade slowly; hydrolyzes to ethanol and siloxanes
Bioaccumulative Potential: May accumulate in aquatic organisms, information limited
Mobility in Soil: Limited mobility due to poor water solubility; degrades to less mobile substances
Other Hazards: Harmful to aquatic life with long-lasting effects
Disposal Methods: Treat chemical as hazardous waste; incineration preferred method under controlled conditions
Container Disposal: Empty containers must be triple rinsed and handled as hazardous, prevent entry into environment
Regulations: Must comply with local, regional, and national waste disposal regulations
Precautions: Do not dispose to sewer or natural waterways
Reuse: Not recommended due to hazard profile
UN Number: UN 1993
Proper Shipping Name: Flammable Liquid, N.O.S. (Methylphenyldiethoxysilane)
Transport Hazard Class: 3 (Flammable Liquid)
Packing Group: III (Minor Danger)
Labels Required: Flammable liquid label
Environmental Hazards: Marine pollutant--mark accordingly
Special Precautions: Avoid releasing to environment, secure containers tightly, transport according to official regulations
OSHA Status: Hazardous chemical under OSHA Hazard Communication Standard
TSCA Listing: Listed on US Toxic Substances Control Act inventory
REACH Status: Registered or pre-registered in EU, check supplier details
SARA Title III: Not subject to reporting under SARA Title III
Other Regulation: Subject to workplace safety, fire codes, hazardous materials transport
