(E)-but-2-enal

(E)-but-2-enal is an unsaturated aldehyde with the molecular formula C4H6O and CAS number 4170-30-3. This organic compound features a four-carbon chain with a double bond in the E-configuration between carbons 2 and 3, and an aldehyde functional group. With a molecular weight of 70.09 g/mol, it is classified as a hazardous chemical requiring careful handling due to its flammable, toxic, and mutagenic properties.

(E)-but-2-enal is a liquid at room temperature with characteristic aldehyde properties. As an α,β-unsaturated aldehyde, it typically exhibits a pungent, irritating odor. The compound is flammable with moderate volatility due to its low molecular weight. Its unsaturated structure makes it reactive toward nucleophiles and prone to polymerization. The molecule's polarity allows for some water solubility while maintaining good solubility in organic solvents.

(E)-but-2-enal is primarily used as an intermediate in organic synthesis and chemical manufacturing. Its reactive aldehyde and alkene functional groups make it valuable for producing pharmaceuticals, agrochemicals, and specialty chemicals. It serves as a building block in the synthesis of more complex molecules and may be used in flavor and fragrance applications, though its toxicity limits direct consumer use. Industrial applications focus on controlled chemical transformations.

(E)-but-2-enal requires strict safety protocols due to its acute toxicity and mutagenic properties. Personnel must wear appropriate PPE including chemical-resistant gloves, safety goggles, and respiratory protection. Work should be conducted in well-ventilated areas or fume hoods to prevent inhalation exposure. Avoid skin contact and ingestion completely. Use explosion-proof equipment due to its flammable nature, and ensure emergency procedures are readily available for immediate response to exposure incidents.

(E)-but-2-enal must be stored in a cool, dry, well-ventilated area away from heat sources, ignition sources, and incompatible materials. Use appropriate secondary containment and ensure containers are tightly sealed to prevent vapor release. Store separately from oxidizing agents, bases, and reactive chemicals. Implement temperature control to prevent degradation and maintain product stability. Access should be restricted to trained personnel only, with proper inventory tracking and safety documentation.

(E)-but-2-enal exposure requires immediate emergency response due to its acute toxicity. For skin contact, immediately remove contaminated clothing and flush with copious amounts of water for at least 15 minutes. If inhaled, move to fresh air immediately and seek medical attention. For eye contact, rinse thoroughly with water and remove contact lenses if present. Never induce vomiting if ingested. Seek immediate medical attention for all exposure routes and provide SDS to medical personnel.

(E)-but-2-enal disposal must comply with local, national, and EU waste regulations due to its hazardous classification. The substance cannot be disposed of as regular waste and requires specialized hazardous waste treatment. Contact licensed waste disposal companies experienced with toxic organic compounds. Incineration at appropriate temperatures may be suitable, but requires proper emission controls. Empty containers may also require special handling. Always consult current waste codes and disposal regulations before disposal.

(E)-but-2-enal is classified under ADR as Class 6.1 (toxic substances), Packing Group I, indicating high toxicity requiring stringent transport controls. Shipments must use UN-approved packaging designed for toxic liquids, with proper labeling including GHS pictograms for toxicity, flammability, and health hazards. Transport documentation must include emergency response information and contact details. Only qualified carriers experienced with hazardous materials should handle transportation, following all ADR requirements for routing and vehicle specifications.

(E)-but-2-enal is subject to comprehensive EU chemical regulations including REACH registration requirements and CLP classification obligations. Its mutagenic properties (Muta. 2) and acute toxicity place it under strict regulatory oversight. While not currently listed as an SVHC, its hazard profile requires compliance with occupational exposure limits and risk management measures. Users must maintain safety data sheets, implement appropriate risk assessments, and ensure worker protection measures meet regulatory standards throughout the supply chain.

(E)-but-2-enal is available through specialized chemical distributors experienced with hazardous materials handling. OYSI, as a European chemical distributor, can provide access to this regulated substance along with proper documentation, safety data sheets, and regulatory compliance support. Due to its hazardous classification, purchases typically require verification of intended use, appropriate handling capabilities, and regulatory compliance. Professional buyers should ensure their suppliers maintain proper licensing and quality certifications for hazardous chemical distribution.