2-Butanol
- Sec-butanol
- Butanol -2
- Sec-butyl alcohol
- Ethylmethylcarbinol
- Butylenhydrat
- 78-92-2
Colorless liquid with an odor pfefferminzartigem
Liquid
0.81 g · cm -3
-114.7 ° C
99 ° C.
17 hPa ( 20 ° C)
- Miscible with many organic solvents
- Soluble in water ( 29.0 g in 100 g of water at 25 ° C)
1.3978 (20 ° C)
Attention
Not set
Template: Infobox chemical / molecular formula search available
2 -butanol ( sec-butanol or also IUPAC butan-2- ol) is a chemical compound and one as a secondary, saturated alcohol to alkanols. 2-butanol is butanol with only one chiral center, so that two optically active enantiomers occurring. If in this article or in the scientific literature "2- butanol " is mentioned without an additional element to the configuration, the racemate [( RS )-2 -butanol or (± )-2 -butanol ] is always meant.
Production and representation
Can be the racemic form of 2-butanol - obtained by reduction of 2-butanone, - that the mixture of the two enantiomers:
Another possibility is the synthesis of hydration but- 2-ene.
Properties
2-butanol is a characteristic sweet and penetrating odor colorless liquid. 2-butanol dissolved in comparison with 1-butanol better in water, specifically about 290 g / l at 25 ° C. With many organic solvents, it is miscible in all proportions.
Safety characteristics
2 -Butanol is considered flammable liquid. Above the flash point is flammable vapor-air mixtures may be formed. The compound has a flash point of 23 ° C. The explosion range is between 1.6 vol% (51 g/m3) as the lower explosive limit ( LEL) and 11 vol % ( 340 g/m3 ) and upper explosive limit (UEL ). The ignition temperature is 390 ° C. The fabric falls within the temperature class T2.
Use
2-butanol is a component in brake fluids, paint strippers and serves as xanthate for the manufacture of flotation agents. Further, it is part of mixed solvents. One uses it also for the synthesis of esters. These in turn are used in flavorings, perfumes and for nitrocellulose.
Safety
2 -Butanol is flammable and volatile. The vapors can with air when the substance is heated above its flash point is 23 ° C ( closed cup ), to form an explosive mixture. They are heavier than air and can cause dizziness and drowsiness. Inhalation or ingestion of the substance can lead to health. 2-butanol is irritating to eyes and respiratory system. 2-butanol is not out of the reach of children.