Product Name: Crotonaldehyde
Manufacturer: Shandong Kunda Biotechnology Co., Ltd.
Chemical Formula: C4H6O
Molecular Weight: 70.09 g/mol
Synonyms: 2-Butenal, crotonal, 2-trans-Butenal
CAS Number: 123-73-9
Recommended Use: Intermediate for pharmaceuticals, rubber accelerators, chemical synthesis
Contact Information: Shandong Kunda Biotechnology Co., Ltd., China, phone and emergency contact listed on manufacturer’s official site
GHS Classification: Flammable liquid (Category 2), Acute toxicity oral (Category 3), Skin irritation (Category 2), Eye irritation (Category 2A), Acute aquatic toxicity (Category 1)
Signal Word: Danger
Hazard Statements: Highly flammable liquid and vapor. Harmful if inhaled, swallowed, or if it comes into contact with skin. Causes skin and eye irritation. Very toxic to aquatic life.
Pictograms: Flame, exclamation mark, skull and crossbones, environment
Precautionary Statements: Keep away from heat sources, sparks, open flames. Wear protective gloves and eye/face protection. Avoid breathing vapors, mist, or spray. Use outdoors or in a well-ventilated area. Wash exposed skin thoroughly after handling. Avoid release to the environment.
Crotonaldehyde: ≥99%
Other Impurities: Trace amounts of other aldehydes, stabilized with acid, less than 1%
Inhalation: Move person to fresh air. Keep at rest in a position comfortable for breathing. If breathing is labored or stopped, provide artificial respiration and seek medical attention immediately.
Skin Contact: Remove contaminated clothing. Rinse skin thoroughly with soap and water for at least fifteen minutes. Seek medical advice if irritation develops.
Eye Contact: Rinse cautiously with water for several minutes; remove contact lenses if present and easy to do. Continue rinsing and get medical help.
Ingestion: Do not induce vomiting. Rinse mouth. Immediately call a Poison Center or doctor. Provide symptomatic treatment.
Suitable Extinguishing Media: Foam, dry chemical, or carbon dioxide. Water spray for cooling containers.
Unsuitable Media: Do not use water jet directly onto substance.
Specific Hazards: Liberates irritating or toxic fumes of carbon monoxide and carbon dioxide under fire conditions. Vapors may form explosive mixtures with air.
Protective Equipment: Firefighters should wear self-contained breathing apparatus and full protective suit.
Special Procedures: Remove containers from fire zone if possible. Use water spray to cool exposed containers. Combustion may produce acrid smoke.
Personal Precautions: Evacuate area and ventilate. Eliminate ignition sources. Use protective equipment: gloves, goggles, chemical-resistant clothing.
Environmental Precautions: Prevent entry into drains, watercourses, soil. Notify authorities if significant release causes environmental risk.
Containment and Cleaning: Absorb in inert material such as dry sand or earth. Collect spillage in tightly sealed, labeled containers for disposal. Ventilate area and wash residue with water after material pickup.
Handling: Avoid contact with skin, eyes, and clothing. No smoking, open flames, or sources of static near work area. Handle only with proper ventilation.
Storage: Store tightly sealed in original packaging, dry and well-ventilated area away from heat and ignition sources. Store apart from oxidizers, acids, alkalis, and strong bases. Maintain temperature below 25°C for optimal stability.
Exposure Limits: ACGIH TLV: 0.3 ppm (0.86 mg/m³) as TWA
Engineering Controls: Local exhaust and general ventilation recommended to minimize airborne concentration.
Personal Protection: Chemical-resistant gloves (nitrile, neoprene), splash-proof safety goggles, flame-retardant lab coats, and, in high exposure settings, respirator (organic vapor cartridge)
Hygiene Measures: Avoid eating, drinking, or smoking in work area. Wash skin exposed to material promptly. Remove contaminated clothing and wash before reuse.
Appearance: Colorless to pale yellow liquid
Odor: Pungent, strong, irritating
Boiling Point: 103°C
Melting Point: -76°C
Density: 0.846 g/cm³ (at 20°C)
Vapor Pressure: 29 mmHg (at 20°C)
Solubility: Miscible with ethanol, ether, benzene; slightly soluble in water
Flash Point: 16°C (closed cup)
Autoignition Temperature: 200°C
Explosive Limits: 2.3% - 15%
Stability: Remains stable under recommended conditions. Contact with strong oxidizers, acids, or bases may result in violent reactions.
Hazardous Polymerization: May occur in absence of stabilizer or under heat.
Hazardous Decomposition: May form acrolein, carbon oxides, and peroxides.
Conditions to Avoid: Heat, sparks, open flames, static discharge, and incompatible substances.
Acute Toxicity: LD50 Oral (rat): 470 mg/kg. LC50 Inhalation (rat): 170 mg/m³ (4 hr exposure).
Health Effects: Causes severe irritation to respiratory tract, skin, and eyes. Symptoms include coughing, burns, lacrimation, headaches.
Chronic Effects: Prolonged or repeated exposure can produce dermatitis or sensitization.
Carcinogenicity: Not listed by IARC, NTP, OSHA as carcinogen.
Additional Data: No reproductive or developmental toxicity data available.
Ecotoxicity: Highly toxic to aquatic organisms; LC50 (fish, 96hr): 1.2 mg/L.
Persistence and Degradability: Readily biodegradable, moderate to high mobility in soil.
Bioaccumulation Potential: Low potential due to rapid degradation.
Notable Risks: Spills can damage aquatic life in even small concentrations.
Waste Treatment Methods: Incinerate in chemical incinerator with afterburner and scrubber. Comply with local and national regulations.
Empty Containers: Rinse thoroughly before disposal. Dispose as hazardous waste.
Precautions: Do not release into sewers or waterways.
UN Number: 1143
UN Proper Shipping Name: Crotonaldehyde
Transport Hazard Class: 3 (Flammable liquid)
Packing Group: I
Labels Required: Flammable Liquid
Special Considerations: Secure upright during transport. Avoid temperature extremes. Emergency response guide available from authorities.
OSHA Status: Hazardous chemical as defined by OSHA Hazard Communication Standard (29 CFR 1910.1200).
TSCA: Listed.
EINECS: 204-613-6.
China IECSC: Listed.
Additional Regulations: Subject to requirements under SARA Sections 302/304, CERCLA, and state right-to-know laws. Consult local, national, and international regulations for comprehensive compliance.
