Cas Number


Other Names


The formula



Isobutyraldehyde is the chemical compound. It is an aldehyde, isomeric with n-butyraldehyde (butanal). It is manufactured, often as a side-product, by the hydroformylation of propene. Its odour is described as that of wet cereal or straw. It undergoes the Cannizaro reaction even though it has alpha hydrogen atom.

Physical and Chemical Properties
Chemical formula C4H8O
Molar mass 72.11 g/mol
Appearance colourless liquid
Density 0.79 g/cm3
Melting point −65 °C (−85 °F; 208 K)
Boiling point 63 °C (145 °F; 336 K)
Solubility in water moderate
Solubility in other solvents miscible in organic solvents
Magnetic susceptibility (χ) -46.38·10−6 cm3/mol
Refractive index(nD) 1.374

1. Isobutyraldehyde makes a feed for the synthesis of alcohols, acids, amines and esters.

2. It is used in the chemical processes for the production of plasticisers, pharmaceuticals, crop protection products, synthetic resins, fragrances, solvents and various additives which are used in numerous branches of the industry (antioxidants, wetting agents, perfume components, improving agents, etc.).