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Material Safety Data Sheet: Modified Acetoxysilane

Identification

Product Name: Modified Acetoxysilane
Chemical Family: Organosilane
Recommended Uses: Industrial sealant, adhesive, construction material additive
Manufacturer: Example Chemicals, Inc.
Address: 1234 Chemical Ave, City, Country, 56789
Telephone: +00 123 456 7890
Email Contact: safety@examplechem.com
Emergency Contact Number: +00 123 456 7980 (24 hours)

Hazard Identification

GHS Classification: Flammable Liquid (Category 3), Skin Corrosive (Category 2), Eye Irritation (Category 2), Acute Toxicity (Category 4, Oral/Inhalation)
Signal Word: Warning
Hazard Statements: Flammable liquid and vapor. Causes skin and eye irritation. Harmful if swallowed or inhaled. May cause respiratory irritation.
Precautionary Statements: Keep away from ignition sources. Avoid breathing vapors. Use only with adequate ventilation. Wear protective gloves, clothing, and eye protection.

Composition / Information on Ingredients

Main Ingredient: Methyltriacetoxysilane (CAS No. 4253-34-3, 55-65%)
Other Silane Derivatives: Alkyl Acetoxysilane (CAS No. XXXX-XX-X, 10-20%)
Acetic Acid: (CAS No. 64-19-7, 2-6%)
Inert Fillers: Proprietary blend (balance, non-hazardous)

First Aid Measures

Inhalation: Move to fresh air. Seek medical attention if symptoms like dizziness, headache, or respiratory distress appear.
Skin Contact: Remove contaminated clothing. Wash thoroughly with soap and water. If skin irritation persists, consult a physician.
Eye Contact: Rinse carefully and continuously with water for at least 15 minutes, holding eyelids open. Remove contact lenses if present and easy to do, then continue rinsing. Get medical attention.
Ingestion: Do not induce vomiting. Rinse mouth and give small amounts of water if person is conscious. Seek immediate medical care.

Fire-Fighting Measures

Suitable Extinguishing Media: Use alcohol-resistant foam, dry chemical, or carbon dioxide. Water spray can help cool containers but may be ineffective for fires.
Hazards from Combustion: May release irritating gases such as acetic acid fumes, carbon monoxide, carbon dioxide, silicon oxides.
Protective Equipment: Firefighters need self-contained breathing apparatus, full protective gear.
Fire & Explosion Hazards: Vapors can form explosive mixtures with air and flash back to source of ignition. Containers may explode in heat of fire.

Accidental Release Measures

Personal Precautions: Evacuate area, eliminate ignition sources, ventilate area. Put on appropriate protective equipment including gloves, goggles, and respirators.
Spill Response: Contain spill with absorbent materials such as sand, earth, or commercial spill kits. Gather and store residue in sealed chemical waste containers.
Environmental Precautions: Prevent run-off to drains, water, or soil. Notify authorities if significant environmental release occurs.
Cleanup Procedures: Flush area with water after all residues are picked up, avoid splashing.

Handling and Storage

Handling: Use in well-ventilated spaces, avoid release of vapors. Ground and bond containers for liquid transfer. Do not smoke or use open flame near product.
Avoid: Contact with skin, eyes, clothing; breathing dust, vapor, or mist.
Hygiene Measures: Wash hands and face thoroughly after handling. Remove contaminated clothing immediately.
Storage Conditions: Store in original, tightly closed containers, in a cool, dry place, away from heat, sparks, flames, or other sources of ignition. Keep away from incompatible substances like strong acids and bases.

Exposure Controls and Personal Protection

Engineering Controls: Use effective local exhaust and general dilution ventilation.
Occupational Exposure Limits: Acetic Acid ACGIH TLV = 10 ppm TWA, 15 ppm STEL.
Personal Protective Equipment: Chemical splash goggles, nitrile gloves, solvent-resistant clothing, and appropriate respirator for organic vapors if airborne exposure limits are exceeded.
Other Protection: Eyewash stations and safety showers recommended in work area.

Physical and Chemical Properties

Form: Clear to slightly cloudy liquid
Color: Colorless to slight yellowish tint
Odor: Sharp, vinegar-like (acetic acid)
Melting Point/Freezing Point: -40°C
Boiling Point/Range: 130-200°C
Flash Point: ~47°C (closed cup)
Evaporation Rate: Moderate
Vapor Density: >1 (Air = 1)
Solubility: Reacts with water, sparingly soluble
pH: Acidic
Viscosity: 1-2 mPa.s at 25°C
Density/Relative Density: 1.05-1.15 g/cm³
Explosive Properties: Vapors may form explosive mixtures with air
Decomposition Temperature: Not specified

Stability and Reactivity

Chemical Stability: Stable under recommended conditions of storage and handling.
Possibility of Hazardous Reactions: Contact with moisture releases acetic acid. May react with strong acids, bases, or oxidizing materials.
Conditions to Avoid: Heat, open flame, spark, moisture, confined spaces.
Hazardous Decomposition Products: Acetic acid, carbon oxides, silicon dioxide, and volatile organic compounds can form.
Incompatible Materials: Strong acids, alkalis, water, and oxidizers.

Toxicological Information

Acute Toxicity: Harmful if swallowed, inhaled or absorbed through skin. Estimated oral LD50 (rat) around 1600 mg/kg for main component.
Chronic Toxicity: Long-term or repeated exposure may cause skin dryness, dermatitis, or irritation of respiratory tract.
Skin and Eye Contact: Can produce severe irritation, redness, swelling, or burns.
Respiratory Effects: May cause headaches, dizziness, or nausea at elevated exposures. Overexposure can cause damage to lungs.
Carcinogenicity: Not classified as carcinogen by IARC, OSHA, or NTP.
Mutagenicity / Reproductive Effects: No data indicating significant effects under normal conditions of use.
Other Health Effects: Acetic acid released may trigger asthma or aggravate existing respiratory conditions.

Ecological Information

Aquatic Toxicity: Toxic to aquatic life with long-lasting effects. LC50 (fish, 96h) estimated at 50 mg/L for main component.
Persistence and Degradability: Modified acetoxysilanes hydrolyze slowly in water, forming silanols and acetic acid, eventually degrading to silicon dioxide.
Bioaccumulation: Low bioaccumulation expected in aquatic species.
Mobility in Soil: Leaching is possible if released in large quantities; breakdown to acetic acid increases mobility.
Other Adverse Effects: Do not release into drains or surface waters; acetic acid lowers water pH, harming organisms.

Disposal Considerations

Waste Treatment Methods: Collect residues and contaminated absorbents in appropriate labeled containers.
Disposal: Follow local, regional, national, and international regulations. Preferred disposal by chemical incineration in presence of scrubbing devices.
Special Precautions: Do not dispose in municipal sewage system.
Handling Contaminated Packaging: Clean thoroughly for recycling or dispose as hazardous waste.

Transport Information

UN Number: UN 1993
UN Proper Shipping Name: Flammable Liquid, N.O.S. (Contains Modified Acetoxysilane)
Transport Hazard Class: 3 (Flammable liquid)
Packing Group: III
Hazard Label: FLAMMABLE LIQUID
Marine Pollutant: Yes
Special Precautions: Secure containers and ensure labeling is visible. Inform transporter of flammability and toxicity hazards.
Transport in bulk: Follow MARPOL Annex II and IBC Code conditions.

Regulatory Information

TSCA Status: All components listed or exempt.
SARA Title III: Acetic acid subject to reporting under Section 313.
OSHA Hazard Communication: Covered as hazardous chemical.
REACH: Registered components compliant with European regulation.
WHMIS Classification: Class B2 (Flammable liquid), Class D2B (Toxic material causing other effects).
Other Regulations: Observe all applicable local, state, federal requirements applicable to this product.
California Proposition 65: Product does not contain chemicals known to cause cancer, birth defects, or reproductive harm.