Butyraldehyde

Product Details

CasNo： 123-72-8

MF： C4H8O

Appearance： liquid

Delivery Time： 15 days

Packing： 200kg/drum

Purity： 99%

• Basic Information:

  • Chinese Name: 正丁醛
  • English Name: n-Butyraldehyde (also commonly referred to as Butyraldehyde)
  • CAS Number: 123-72-8
  • Molecular Formula: C₄H₈O
  • Molecular Weight: 72.11

• Physical Properties:

  • Appearance: Colorless transparent liquid.
  • Odor: Has a suffocating odor.
  • Melting Point: -96°C.
  • Boiling Point: 75°C.
  • Density: 0.817 g/cm³.
  • Vapor Density: 2.5 (relative to air, air = 1).
  • Vapor Pressure: 90 mmHg (at 20°C).
  • Solubility: Slightly soluble in water, with a solubility of 7.1 g/100 mL in water at 25°C; miscible with most organic solvents such as ethanol and diethyl ether.

• Chemical Properties:

  • It has high chemical reactivity and is flammable. Its vapor can form an explosive mixture with air, with an explosion limit of 1.7%–11.1% (by volume).
  • It can react with oxidizing agents, strong alkalis, and acids. It may form explosive peroxides and can also undergo polymerization reactions.

• Sources:

  • The main production method is the propylene carbonylation process, which is further divided into the high-pressure method and the low-pressure method. The high-pressure method uses cobalt carbonyl as a catalyst, featuring harsh reaction conditions and more by-products. The low-pressure method uses rhodium-phosphine carbonyl complex as a catalyst, with low reaction pressure, a high ratio of n-isomers to other isomers, few by-products, and high conversion rate—it is currently the commonly used production method.
  • In addition, other methods include the acetaldehyde condensation method and the butanol oxidative dehydrogenation method.

• Applications:

  • It is an important intermediate for organic synthesis, and can be used to produce butyric acid, cellulose butyrate, polyvinyl butyral, etc.
  • Butanol and 2-ethylhexanol (derived from n-butyraldehyde) are key raw materials for plasticizers.
  • Its condensation with formaldehyde can produce trimethylolpropane, which is a raw material for synthesizing alkyd resin plasticizers and air-drying oils.
  • It can condense with phenol to produce oil-soluble resins, and condense with urea to produce alcohol-soluble resins.
  • In the pharmaceutical industry, it is used to manufacture drugs such as "meprobamate" and "pyrimethamine".
  • As specified in GB 2760—1996 (National Food Safety Standard for the Use of Food Additives), n-butyraldehyde is a permitted food fragrance, mainly used to formulate flavors such as banana, caramel, and other fruit types.

• Storage Conditions:

  • It should be stored in a cool and well-ventilated warehouse, away from ignition sources and heat sources.
  • The warehouse temperature should not exceed 29°C, and the container should be kept sealed.
  • It must be stored separately from oxidizing agents and acids; mixed storage is strictly prohibited.