Acetyl chloride

Acetyl chloride is an organic chemical compound with the molecular formula C2H3ClO and a molecular weight of 78.5 g/mol. It is an acyl chloride derivative of acetic acid, classified as a highly reactive organic intermediate. This colorless liquid is characterized by its pungent, irritating odor and high reactivity with water and alcohols. Acetyl chloride is classified as a flammable liquid (Category 2) and skin corrosive substance (Category 1B), requiring careful handling and appropriate safety measures during use and storage.

Acetyl chloride is a colorless, volatile liquid with a sharp, pungent odor that is highly irritating to the respiratory system. It has a molecular weight of 78.5 g/mol and reacts violently with water, producing acetic acid and hydrogen chloride gas. The compound is miscible with most organic solvents but decomposes rapidly in the presence of moisture. It has a low boiling point and high vapor pressure, making it highly volatile at room temperature.

Acetyl chloride is primarily used as an acetylating agent in organic synthesis for the introduction of acetyl groups into organic molecules. It serves as a key intermediate in pharmaceutical manufacturing, particularly for producing acetylated compounds and esters. The compound is also utilized in the production of anhydrides, in analytical chemistry for acetylation reactions, and in the synthesis of various organic chemicals including dyes, pesticides, and specialty chemicals in industrial applications.

Acetyl chloride must be handled with appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and protective clothing due to its corrosive nature. Work should be conducted in a well-ventilated area or under a fume hood to prevent inhalation of vapors. Avoid contact with water, alcohols, and other reactive substances. Use only non-sparking tools and equipment due to its flammable properties. Ensure fire extinguishing equipment is readily available during handling operations.

Acetyl chloride must be stored in a cool, dry, well-ventilated area away from heat sources, ignition sources, and incompatible materials. Keep containers tightly sealed and protect from moisture to prevent hydrolysis. Store away from water, alcohols, amines, and strong bases which can react violently with the compound. Use appropriate secondary containment and ensure storage areas are equipped with proper fire suppression systems due to its flammable nature (Class 2 flammable liquid).

Acetyl chloride contact requires immediate action due to its corrosive properties. For skin contact, immediately remove contaminated clothing and flush the affected area with large amounts of water for at least 15 minutes. In case of eye contact, rinse immediately with water for at least 15 minutes and seek medical attention. If inhaled, move to fresh air immediately. For ingestion, do not induce vomiting and seek immediate medical attention. Always consult a physician after any exposure incident.

Acetyl chloride disposal must comply with local and national hazardous waste regulations as it is classified as hazardous waste. Small quantities can be carefully hydrolyzed by slow addition to ice water under controlled conditions, producing acetic acid and HCl which can then be neutralized. Larger quantities should be disposed of through licensed hazardous waste disposal companies. Never pour directly into drains or sewers, and ensure proper documentation of disposal activities according to waste tracking requirements.

Acetyl chloride is classified as ADR Class 3 (flammable liquids), Packing Group II, requiring specific transport regulations compliance. It must be packaged in approved containers with proper labeling including GHS02 (flame) and GHS05 (corrosion) pictograms and 'Danger' signal word. Transport vehicles must carry appropriate emergency equipment and documentation. Drivers require ADR training certification, and the substance must be segregated from incompatible materials during transport. Ensure compliance with all applicable dangerous goods transport regulations.

Acetyl chloride is subject to various regulatory frameworks including REACH registration requirements in Europe and CLP classification as Flam. Liq. 2 and Skin Corr. 1B. It is not listed as a SVHC (Substance of Very High Concern) under REACH. The compound must comply with workplace safety regulations, transport regulations (ADR), and local environmental regulations. Users must ensure proper risk assessment, safety data sheet distribution, and compliance with occupational exposure limits and handling requirements.

Acetyl chloride is available through OYSI, a specialized European distributor of technical chemicals serving industrial and professional customers across Europe. As a regulated chemical requiring proper handling expertise, it should only be purchased from qualified suppliers who can provide proper documentation, safety data sheets, and technical support. OYSI ensures compliance with all relevant European regulations and provides reliable supply chain management for this specialized chemical intermediate to qualified industrial customers.