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Product Name: Pentyltrichlorosilane
Chemical Formula: C5H11Cl3Si
CAS Number: 3401-26-7
Synonyms: n-Pentyltrichlorosilane; Trichloropentylsilane
Recommended Use: Intermediate in organic synthesis; surface treatment chemical
Manufacturer Details: Provided by supplier on request
Emergency Phone: Emergency contact number supplied on container label
GHS Classification: Flammable Liquid (Category 3), Skin Corrosive (Category 1B), Serious Eye Damage (Category 1), Specific Target Organ Toxicity – Single Exposure (Respiratory Tract Irritation, Category 3)
Pictograms: Flame, Corrosion, Exclamation Mark
Signal Word: Danger
Hazard Statements: Flammable liquid and vapor. Causes severe skin burns and eye damage. May cause respiratory irritation.
Precautionary Statements: Avoid breathing vapors or mist. Keep away from heat and open flames. Wear protective gloves, clothing, eye and face protection. Use only in a well-ventilated area.
Chemical Name: Pentyltrichlorosilane
Concentration: Over 95% by weight
Impurities: Less than 5%, typically includes minor hydrolysis products
Other Ingredients: None intentionally added
General Information: Seek immediate medical help. Remove victim from exposure area.
Inhalation: Move to fresh air, monitor breathing. If breathing is difficult, give oxygen.
Skin Contact: Remove contaminated clothing. Rinse skin with plenty of water for at least 15 minutes. Wash thoroughly with soap and water.
Eye Contact: Rinse with water for minimum 20 minutes, lifting eyelids occasionally. Seek urgent eye specialist advice.
Ingestion: Rinse mouth. Do not induce vomiting. Never give anything by mouth to an unconscious person.
Suitable Extinguishing Media: Dry chemical, CO2, or alcohol-resistant foam. Water spray can be used to cool unopened containers only.
Specific Hazards: Emits toxic fumes, hydrochloric acid, and silicon oxides under heat.
Protective Equipment: Wear full protective clothing and self-contained breathing apparatus.
Firefighting Tactics: Keep unnecessary personnel away. Dike runoff water to prevent entry into sewers or waterways.
Personal Precautions: Evacuate area. Wear proper protective gear including gloves and respirator.
Environmental Precautions: Prevent runoff into drains, groundwater, and surface water.
Containment and Cleanup: Absorb spillage with inert material like sand or earth. Place waste in chemical container for disposal. Ventilate area very well.
Handling Practices: Work in a chemical fume hood. Avoid contact with skin, eyes, and clothing. Do not breathe vapors.
Storage Requirements: Store tightly sealed in a cool, dry, ventilated place. Keep away from heat, sparks, open flames, and moisture. Keep container upright and tightly closed when not in use. Do not store with water-reactive or oxidizing agents.
Exposure Limits: No established industrial exposure limits for pentyltrichlorosilane; treat as a hazardous chemical.
Engineering Controls: Use local exhaust ventilation. Maintain eye wash stations and safety showers near processing areas.
Personal Protection: Wear chemical-resistant gloves (e.g., butyl rubber), goggles or face shield, flame-resistant lab coat. Use a NIOSH-approved respirator in case of insufficient ventilation.
Hygiene Measures: Wash hands and face thoroughly after handling and before eating, drinking, or smoking.
Appearance: Colorless to pale yellow liquid
Odor: Sharp, irritating odor
Boiling Point: Approximately 162°C
Melting Point: Below -40°C
Flash Point: 58°C
Autoignition Temperature: Data not readily available
Explosion Limits: Data not readily available
Vapor Pressure: Approximately 7 mmHg at 20°C
Solubility in Water: Reacts violently; hydrolyzes to form hydrochloric acid and silanols
Density: About 1.07 g/cm³ at 25°C
Viscosity: Not established; flows easily as a liquid
Chemical Stability: Stable under dry, cool conditions in sealed containers.
Reactive Materials: Water, moist air, alcohols, strong oxidizers.
Hazardous Decomposition: Hydrolysis produces hydrochloric acid and silicon dioxide.
Polymerization: Not expected under recommended conditions.
Special Considerations: Product fume is corrosive and harmful if inhaled.
Acute Effects: Causes severe burns on contact with skin and eyes. Vapors cause respiratory tract irritation, coughing, and choking.
Chronic Effects: Repeated or prolonged exposure could cause dermatitis or chronic lung conditions.
Sensitization: No data on sensitization. Handle with extreme care.
Carcinogenicity: Not classified as carcinogenic by ACGIH, IARC, NTP, or OSHA.
LD50 (oral, rat): Estimated above 2,000 mg/kg based on similar silanes.
Irritation Data: Strongly corrosive to mucous membranes.
Aquatic Toxicity: Hydrolysis products (HCl and organosilanol) may harm aquatic life; low persistence in the environment.
Mobility: Reacts rapidly in contact with water, converting to less volatile substances.
Persistence and Degradability: Hydrolyzes quickly; not considered persistent.
Bioaccumulation Potential: Not expected to bioaccumulate in organisms.
Other Effects: Acidic hydrolysis may lower local pH and affect aquatic microflora and fauna.
Waste Disposal: Treat waste as hazardous. Incinerate in approved facility. Avoid direct discharge to sewers or surface waters.
Contaminated Packaging: Triple rinse containers. Dispose via licensed contractor.
Local Regulations: Comply with government, state, and local waste disposal regulations.
UN Number: 2987
UN Proper Shipping Name: Pentyltrichlorosilane
Transport Hazard Class: 6.1 (Toxic substances); accompanies danger label for corrosives and flammable liquids
Packing Group: II (Medium danger)
Environmental Hazards: Classified as dangerous for environment if spilled
Transport Labels: Corrosive, Toxic, Flammable
OSHA: Hazardous Chemical under Hazard Communication Standard (29 CFR 1910.1200)
EPA: Not specifically listed, but waste subject to hazardous waste requirements
REACH: Covered under REACH, notification required above tonnage thresholds
SARA 313: Not listed
TSCA: Listed in TSCA Inventory
WHMIS (Canada): Classified as Toxic and Corrosive Material
Other: Guidelines for safe industrial use available from chemical supplier and local authorities
