2-Methyl-1-butanol

• 2- methylbutyl
• Sec - butyl carbinol
• (±)- 2-methyl -1-butanol
• 2- methyl butanol ( ambiguous )

Colorless liquid with an unpleasant odor

Liquid

0.82 g · cm -3

-70 ° C

129 ° C.

3.28 mbar (20 ° C)

• Soluble in water ( 36 g · l-1 at 20 ° C)
• Miscible with alcohol and ether

1.4107 (20 ° C, 589 nm)

Attention

• 2890 mg · kg -1 ( LD50, Rabbit, transdermal)
• 4170 mg · kg -1 ( LD50, rat, oral)

Template: Infobox chemical / molecular formula search available

2-methyl -1-butanol is a chemical compound selected from the group of the alcohols, specifically the pentanols. It occurs in two isomeric forms.

Occurrence

2-methyl -1-butanol occurs naturally in virtually all fruits (such as apples ), wine, beer and other spirits before. It is formed in the alcoholic fermentation by-products from the amino acids leucine and isoleucine. It is also detectable as a component of the mold smell.

Production and representation

2-methyl -1-butanol, by the hydroformylation of n- butenes with a mixture of carbon monoxide and hydrogen in the presence of a catalyst Cobalthydrocarbonyl, wherein a mixture of isomeric C5 aldehydes formed, which are then hydrogenated to the corresponding amyl alcohol.

It can also be obtained by the fractionation of fusel oils and involves chlorination of pentanes.

Properties

2-methyl -1-butanol is a flammable, volatile, colorless liquid with an unpleasant odor, which is soluble in water. It decomposes when heated. It has an odor threshold of 45 ug / m³ and a sour, pungent odor.

Use

2-methyl -1-butanol is used as a solvent for resins, fats and oils and in organic syntheses ( introduction of an active amyl ). In many processed foods, it is used as a flavoring. In the U.S. it is used as a biochemical agent as a lure for hornets and wasps in traps.

Safety

The vapors of 2-methyl -1-butanol can form (40 ° C, ignition temperature 340 ° C flash point) with air to form an explosive mixture. Furthermore, they have a narcotic effect.