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Product Name: 2-Ethylbutyraldehyde
Chemical Formula: C6H12O
Synonyms: 2-Ethylbutanal, alpha-Ethylbutyraldehyde
CAS Number: 97-96-1
Molecular Weight: 100.16 g/mol
Recommended Use: Intermediate in organic synthesis, fragrances, laboratory chemical
Supplier Information: Please contact your regular chemical provider for full address and emergency number
Emergency Contact: Chemtrec (North America): 1-800-424-9300
GHS Classification: Flammable liquids (Category 3), Acute toxicity–oral (Category 4), Skin irritation (Category 2), Eye irritation (Category 2A), Specific target organ toxicity—single exposure (Category 3)
Signal Word: Warning
Hazard Statements: Flammable liquid and vapor. Harmful if swallowed. Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.
Pictogram(s): Flame, Exclamation Mark
Precautionary Statements: Keep away from heat, sparks, open flame. Use explosion-proof equipment. Avoid breathing vapors. Wash skin thoroughly after handling. Wear protective gloves, clothing, eye and face protection.
Chemical Name: 2-Ethylbutyraldehyde
Concentration: 100%
Impurities: None reported based on common suppliers
CAS Number: 97-96-1
Other Components: Does not contain additives, stabilizers, or inhibitors as delivered for laboratory use
General Advice: Remove contaminated clothing and shoes. Ensure access to fresh air; carry victim to fresh air zone if inhaled. Rinse eyes cautiously with water for several minutes. If in eyes, remove contact lenses. Rinse skin with soap and water for at least 15 minutes. Seek medical attention for symptoms.
If Inhaled: Move person to fresh air. Provide oxygen if breathing is difficult. Contact a physician.
If Ingested: Do not induce vomiting. Rinse mouth with water. Call a poison control center or physician.
If on Skin: Remove contaminated clothing. Wash exposed area with water and soap.
If in Eyes: Rinse cautiously with water for several minutes. Seek immediate medical attention if irritation persists.
Suitable Extinguishing Media: Use carbon dioxide, dry chemical powder, foam, or alcohol-resistant foam. Water spray may help cool containers.
Specific Hazards: Vapors may form explosive mixtures with air. Hazardous thermal decomposition products include carbon oxides.
Protective Equipment for Firefighters: Wear self-contained breathing apparatus and full protective gear.
Fire Hazards: Containers may explode when heated. Flammable vapors can flow along surfaces to distant ignition source.
Personal Precautions: Evacuate unnecessary personnel. Wear appropriate personal protective equipment including gloves, goggles, and respirators.
Environmental Precautions: Prevent input to waterways, sewers, and soil.
Methods for Clean-Up: Remove ignition sources. Absorb with inert material like sand, vermiculite. Collect spilled material in a suitable container for disposal. Ventilate area. Decontaminate site with soap and water thereafter.
Further Handling: Emergency showers and eye wash stations should be accessible in areas of use.
Precautions for Handling: Avoid inhalation of vapors, ingestion, and skin and eye contact. Use only with adequate ventilation. Ground and bond containers when transferring liquid.
Conditions for Storage: Store away from direct sunlight, heat, sparks, open flames, and oxidizers. Keep in tightly closed original container, in a dry, cool, and well-ventilated place. Separate from incompatible materials such as strong acids and oxidizing agents. Label and secure storage area.
Exposure Limits: No established OSHA or ACGIH exposure limits for pure 2-Ethylbutyraldehyde.
Engineering Controls: Use local exhaust or general room ventilation. Install eyewash stations and emergency showers.
Personal Protective Equipment: Chemical-resistant gloves (nitrile, neoprene), safety goggles or face shield, lab coat. Use a NIOSH-approved respirator for concentrations above safe levels or for unknown atmospheres.
Hygiene Measures: Wash hands before eating, drinking, or smoking. Remove contaminated clothing before entering eating areas.
Appearance: Colorless to pale yellow liquid
Odor: Strong, pungent
Melting Point: -99°C
Boiling Point: 115–117°C
Flash Point: 22°C (closed cup)
Autoignition Temperature: 229°C
Vapor Pressure: 16 mmHg at 20°C
Vapor Density: 3.5 (air = 1)
Density: 0.809 g/mL at 25°C
Solubility: Slightly soluble in water; miscible with most organic solvents
Viscosity: Low
Partition Coefficient (log Kow): 1.24
Evaporation Rate: Moderate (butyl acetate = 1)
pH: Not applicable
Chemical Stability: Stable under recommended storage conditions. Sensitive to air, light, and moisture, which can induce oxidation and polymerization.
Reactivity: May react violently with strong oxidizing agents.
Hazardous Reactions: Releases flammable vapors. May form peroxides.
Incompatible Materials: Strong acids, strong bases, oxidizers.
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, and possibly irritating aldehyde vapors.
Acute Toxicity: LD50 (oral, rat): approximately 670 mg/kg; inhalation effects not fully characterized in published literature, but can cause respiratory system irritation.
Skin Corrosion/Irritation: Causes moderate to severe skin irritation.
Serious Eye Damage/Irritation: Causes severe eye irritation, redness, tearing, possible corneal injury.
Respiratory Effects: Inhalation may result in coughing, respiratory discomfort, and headache.
Chronic Effects: No long-term animal studies reported significant carcinogenic effects, but exposure to aldehydes in general may lead to sensitization or upper respiratory symptoms.
Genotoxicity: Not classified as mutagenic by available regulatory agencies.
Carcinogenicity: Not listed by IARC, NTP, OSHA.
Additional Information: Effects of repeated exposure not conclusively established; prudent to limit exposure.
Ecotoxicity: Toxic to aquatic organisms at elevated concentrations. LC50 (fish, 96hr, estimated): 25–35 mg/L.
Persistence and Degradability: Biodegrades in water and soil within days to weeks; volatility and solubility promote dispersion.
Bioaccumulative Potential: Low, due to moderate partition coefficient.
Mobility in Soil: Expected to migrate if released to soil due to high mobility and partial solubility in water.
Other Adverse Effects: May contribute to local oxygen depletion on small-scale aquatic spills.
Waste Disposal Methods: Gather contaminated absorbents and solids in sealed, labeled containers. Incinerate at a licensed chemical incinerator in compliance with local, regional, and national regulations.
Contaminated Packaging: Rinse with suitable solvent and dispose as hazardous waste.
Disposal Precautions: Do not discharge to sewers, waterways, or soil. Avoid manual handling of waste without protection.
Recommendations: Consult local regulations for hazardous chemical disposal practices.
UN Number: UN 1195
UN Proper Shipping Name: Ethylbutyraldehydes
Transport Hazard Class: 3 (Flammable Liquid)
Packing Group: II
Marine Pollutant: No
Environmental Hazards: Avoid spillage into drainage systems
Additional Transport Information: Road transport (ADR/RID), sea transport (IMDG), and air transport (IATA) regulations apply. Label all packages with “Flammable Liquid” placards.
OSHA: Regulated as a hazardous chemical under the Hazard Communication Standard.
TSCA Status: Listed.
SARA Title III Sec 311/312: Acute health hazard, fire hazard.
California Proposition 65: Not listed as carcinogenic or reproductive toxicant.
REACH Status: Registered in the European Union for industrial use.
Canada DSL/NDSL: Listed on the Domestic Substances List.
Other Local Regulation: Check state and municipal requirements for storage, handling, and emissions.
