Isovaleraldehyde

• 3-methylbutanal
• Isopentanal

Colorless liquid with an unpleasant odor

Liquid

0.80 g · cm -3 ( 20 ° C)

-51 ° C

92 ° C

61 hPa ( 20 ° C)

Poorly in water (20 g · l-1 at 20 ° C)

1.3902 (20 ° C)

Risk

5600 mg · kg -1 ( LD50, rat, oral)

Template: Infobox chemical / molecular formula search available

Isovaleraldehyde is a chemical compound selected from the group of the aldehydes. With its isomeric compounds valeraldehyde (n- pentanal ), 2- methyl butyraldehyde and pivalaldehyde it forms the substance group of pentanals.

Occurrence

Isovaleraldehyde comes as part of the alarm pheromone of the wasp Vespula vulgaris in front of and in sandalwood oil.

Production and representation

Isovaleraldehyde is prepared by hydroformylation of isobutene.

Properties

Isovaleraldehyde is light-and air-sensitive and has a viscosity of 0.58 mPa · s at 20 ° C.

Use

Isovaleraldehyde is used as intermediate for the preparation of drugs, vitamins, pesticides, solvents and plasticizers. In 2000, several thousand tons were produced in Germany.

Safety

The vapors of isovaleraldehyde can form (-3 ° C, ignition temperature 210 ° C flash point) with air to form an explosive mixture.

Proof

Detection of isovaleraldehyde may take place by absorption with a 2,4- dinitrophenyl -impregnated glass fiber filter, followed by desorption with acetonitrile followed by chromatographic determined by HPLC with UV detection (365 nm).