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2-butenoic acid
CAS No.: 3724-65-0
Formula: C4H6O2
Exact Mass: 86.03680
Molecular Weight: 86.08920
PSA: 37.30000
LogP: 0.64710
Reference Price: $6,000/kg Inquiry Now
2-butenoic acid 3724-65-0 MSDS

Section 1. Chemical Product and Company Identification
    Crotonic acid
    Common Name/
    Trade Name
    Commercial Name(s)
    Chemical Name
    Chemical Family
    Crotonic acid

Section 4. First Aid Measures
    Eye Contact        Check for and remove any contact lenses. In case of contact, immediately flush eyes with plenty of water    
    for at least 15 minutes. Cold water may be used. Get medical attention immediately.
    Skin Contact        In case of contact, immediately flush skin with plenty of water for at least 15 minutes while removing    
    contaminated clothing and shoes. Cover the irritated skin with an emollient. Cold water may be used.Wash
    clothing before reuse. Thoroughly clean shoes before reuse. Get medical attention immediately.
    Serious Skin Contact        Wash with a disinfectant soap and cover the contaminated skin with an anti-bacterial cream. Seek    
    immediate medical attention.
    Inhalation        If inhaled, remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.    
    Get medical attention.
    Serious Inhalation        Evacuate the victim to a safe area as soon as possible. Loosen tight clothing such as a collar, tie, belt or    
    waistband. If breathing is difficult, administer oxygen. If the victim is not breathing, perform mouth-to-mouth
    resuscitation. WARNING: It may be hazardous to the person providing aid to give mouth-to-mouth
    resuscitation when the inhaled material is toxic, infectious or corrosive. Seek immediate medical attention.
    Ingestion        Do NOT induce vomiting unless directed to do so by medical personnel. Never give anything by mouth to    
    an unconscious person. If large quantities of this material are swallowed, call a physician immediately.
    Loosen tight clothing such as a collar, tie, belt or waistband.
    Serious Ingestion        Not available.    

Section 5. Fire and Explosion Data
    Flammability of the Product Combustible.
    Auto-Ignition Temperature 396°C (744.8°F)
    OPEN CUP: 88°C (190.4°F).
    Flash Points
    Not available.
    Flammable Limits
    These products are carbon oxides (CO, CO2).
    Products of Combustion
    Fire Hazards in Presence of Flammable in presence of open flames and sparks, of heat.
    Various Substances
    Risks of explosion of the product in presence of mechanical impact: Not available.
    Explosion Hazards in
    Risks of explosion of the product in presence of static discharge: Not available.
    Presence of Various
    Fire Fighting Media        SMALL FIRE: Use DRY chemical powder.    
    and Instructions        LARGE FIRE: Use water spray, fog or foam. Do not use water jet.    
    When heated to decomposition it emits acrid smoke and irritating fumes, carbon dioxide, carbon monoxide.
    Special Remarks on
    Fire Hazards
    Special Remarks on Explosion Not available.

Section 6. Accidental Release Measures
    Small Spill        Dilute with water and mop up, or absorb with an inert dry material and place in an appropriate waste    
    disposal container.
    Large Spill        Combustible material. Corrosive liquid.    
    Keep away from heat. Keep away from sources of ignition. Stop leak if without risk. Absorb with DRY
    earth, sand or other non-combustible material. Do not get water inside container. Do not touch spilled
    material. Use water spray curtain to divert vapor drift. Prevent entry into sewers, basements or confined
    Crotonic acid

Section 7. Handling and Storage
    Precautions        Keep container dry. Keep away from heat. Keep away from sources of ignition. Ground all equipment    
    containing material. Do not ingest. Do not breathe gas/fumes/ vapor/spray. Never add water to this
    product. In case of insufficient ventilation, wear suitable respiratory equipment. If ingested, seek medical
    advice immediately and show the container or the label. Avoid contact with skin and eyes. Keep away from
    incompatibles such as oxidizing agents.
    Storage        Keep container in a cool, well-ventilated area. Keep container tightly closed and sealed until ready for use.    
    Avoid all possible sources of ignition (spark or flame).

Section 8. Exposure Controls/Personal Protection
    Engineering Controls        Provide exhaust ventilation or other engineering controls to keep the airborne concentrations of vapors    
    below their respective threshold limit value. Ensure that eyewash stations and safety showers are proximal
    to the work-station location.
    Personal Protection        Face shield. Full suit. Vapor respirator. Be sure to use an approved/certified respirator or equivalent.    
    Gloves. Boots. Respiratory protection is not necessary for normal handling. Good room ventilation or use
    of local exhaust (fume hood) is sufficient. Use a vapor respirator under conditions where exposure to the
    substance is apparent (e.g. generation of high concentrations of mist or vapor or dust, inadequate
    ventilation, development of respiratory tract irritation), and engineering controls are not feasible. Be sure to
    use an approved/certified respirator or equivalent.
    Personal Protection in Case of Splash goggles. Full suit. Vapor respirator. Boots. Gloves. A self contained breathing apparatus should
    a Large Spill        be used to avoid inhalation of the product. Suggested protective clothing might not be sufficient; consult a    
    specialist BEFORE handling this product.
    Exposure Limits        Not available.    

Section 9. Physical and Chemical Properties
    Physical state and appearance Liquid.        Not available.    
    Taste        Not available.    
    Molecular Weight        86.09 g/mole    
    Color        Not available.    
    pH (1% soln/water)        Not available.    
    185°C (365°F)
    Boiling Point
    Melting Point        72°C (161.6°F)    
    Critical Temperature        Not available.    
    Specific Gravity        0.9604 - 1.03 (Water = 1)    
    Vapor Pressure        0 kPa (@ 20°C)    
    2.97 (Air = 1)
    Vapor Density
    Volatility        Not available.    
    Not available.
    Odor Threshold
    Water/Oil Dist. Coeff.        Not available.    
    Ionicity (in Water)        Not available.    
    Dispersion Properties        See solubility in water, diethyl ether, acetone.    
    Solubility        Easily soluble in hot water.    
    Soluble in cold water, diethyl ether, acetone.
    IN ETHANOL @ 25 DEG C: 52.5% WT/WT; ACETONE @ 25 DEG C: 53.0% W/W; IN TOLUENE @ 25
    DEG C: 37.5% WT/WT
    Water solubility: 8.6X10+4 mg/l at 25 deg C
    555 g/l in water at 20 deg C
    Crotonic acid

Section 10. Stability and Reactivity Data
    The product is stable.
    Instability Temperature        Not available.    
    Heat, ignition sources, incompatible materials
    Conditions of Instability
    Incompatibility with various Reactive with oxidizing agents.
    Non-corrosive in presence of glass.
    Special Remarks on        Not available.    
    Special Remarks on        Not available.    
    Will not occur.

Section 11. Toxicological Information
    Routes of Entry        Inhalation. Ingestion.    
    Toxicity to Animals        Acute oral toxicity (LD50): 1000 mg/kg [Rat].    
    Acute dermal toxicity (LD50): 200 mg/kg [Guinea pig].
    Chronic Effects on Humans May cause damage to the following organs: lungs.
    Other Toxic Effects on        Very hazardous in case of skin contact (irritant), of ingestion.    
    Humans        Hazardous in case of skin contact (corrosive), of eye contact (corrosive), of inhalation.    
    Special Remarks on        Not available.    
    Toxicity to Animals
    Special Remarks on        Not available.    
    Chronic Effects on Humans
    Special Remarks on other        Acute Potential Health Effects:    
    Toxic Effects on Humans        Skin: Corrosive. Causes severe irritation and burns.    
    Eyes: Corrosive. Causes severe irritation and burns.
    Inhalation: Breathing in Crotonic Acid can irritate the nose and throat causing coughing and wheezing. It
    may cause burns to the respiratory tract.
    Ingestion: May be harmful if swallowed. Can cause digestive tract/gastrointestinal tract burns.
    Chronic Potential Health Effects:
    Inhalation: It can irritate the lungs. Repeated exposure may cause bronchitis to develop with cough,
    phlegm, and/or shortness of breath.

Section 12. Ecological Information
    Not available.
    BOD5 and COD        Not available.    
    Products of Biodegradation        Possibly hazardous short term degradation products are not likely. However, long term degradation    
    products may arise.
    Toxicity of the Products        The products of degradation are less toxic than the product itself.    
    of Biodegradation
    Special Remarks on the        Not available.    
    Products of Biodegradation
    Crotonic acid

Section 13. Disposal Considerations
    Waste Disposal        Waste must be disposed of in accordance with federal, state and local environmental    
    control regulations.

Section 14. Transport Information
    DOT Classification        Class 8: Corrosive material    
    UNNA: 2823 : Crotonic Acid, solid PG: III
    Not available.
    Special Provisions for
    DOT (Pictograms)

Section 15. Other Regulatory Information and Pictograms
    Pennsylvania RTK: Crotonic acid
    Federal and State
    Massachusetts RTK: Crotonic acid
    New Jersey: Crotonic acid
    TSCA 8(b) inventory: Crotonic acid
    California        California prop. 65: This product contains the following ingredients for which the State of California has    
    Proposition 65        found to cause cancer which would require a warning under the statute: No products were found.    
    California prop. 65: This product contains the following ingredients for which the State of California has
    found to cause birth defects which would require a warning under the statute: No products were found.
    Other Regulations        OSHA: Hazardous by definition of Hazard Communication Standard (29 CFR 1910.1200).    
    EINECS: This product is on the European Inventory of Existing Commercial Chemical Substances (EINECS
    No. 223-077-4).
    Canada: Listed on Canadian Domestic Substance List (DSL).
    China: Listed on National Inventory.
    Japan: Listed on National Inventory (ENCS).
    Korea: Listed on National Inventory (KECI).
    Philippines: Listed on National Inventory (PICCS).
    Australia: Listed on AICS.
    WHMIS (Canada) CLASS E: Corrosive liquid.
    Other Classifications
    DSCL (EEC)        R34- Causes burns.        S26- In case of contact with eyes, rinse    
    immediately with plenty of water and seek
    medical advice.
    S36/37/39- Wear suitable protective clothing,
    gloves and eye/face protection.
    S45- In case of accident or if you feel unwell,
    seek medical advice immediately (show the
    label where possible).
    Health Hazard
    HMIS (U.S.A.)        3 National Fire Protection    
    2 Flammability
    2 Association (U.S.A.)
    Fire Hazard
    3 0 Reactivity
    Specific hazard
    Personal Protection
    WHMIS (Canada)
    Crotonic acid
    DSCL (Europe)
    TDG (Canada)
    ADR (Europe)
    Protective Equipment
    Full suit.
    Vapor respirator. Be sure to use an
    approved/certified respirator or
    equivalent. Wear appropriate respirator
    when ventilation is inadequate.


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