Pentanones

The pentanones are a group of three isomeric saturated ketones with five carbon atoms. They have the general molecular formula C ₅ H ₁₀ O and a molar mass of 86.13 g · mol ⁻¹ . They differ in their properties, so the melting point of 3-pentanone is significantly higher compared to the other two, as the molecule has a symmetry.

You are u. a. accessible by oxidation of the corresponding secondary pentanols ( 2-pentanol , 3-pentanol and 3-methyl-2-butanol ). The pentanals have the same molar mass.

Pentanones

Surname

2-pentanone

3-pentanone

3-methylbutanone

other names

Methyl- n- propyl ketone

Diethyl ketone

Methyl isopropyl ketone

Structural formula

CAS number

107-87-9

96-22-0

563-80-4

PubChem

7895

7288

11251

ECHA InfoCard

−78 ° C

−39 ° C

−92 ° C

boiling point

102 ° C

94 ° C

density

0.81 g cm ⁻³ (20 ° C)

Vapor pressure

37 hPa (20 ° C)

500 hPa (20 ° C)

53.1 hPa (20 ° C)

Solubility
in water

43 g l ⁻¹ (20 ° C)

35 g l ⁻¹ (25 ° C)

6 g l ⁻¹ (20 ° C)

Flash point

7 ° C

6 ° C

−1 ° C

Ignition temperature

445 ° C

455 ° C

475 ° C

Explosion limits

1.5 to 8.2%

1.6 to 7.7%

1.4 to 8.0%

GHS
labeling

from Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary

danger

from Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary

danger

from Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary

danger

H and P phrases

225-302-319

225-319-335-336

225

no EUH phrases

210-301 + 312 + 330-305 + 351 + 338-370 + 378-403 + 235

210-305 + 351 + 338-261-304 + 340-403 + 233

210-233

Tox data

1600 mg kg ⁻¹ ( LD ₅₀ , rat , oral )

2140 mg kg ⁻¹ ( LD ₅₀ , rat , oral )

148 mg kg ⁻¹ ( LD ₅₀ , rat , oral )

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l Entry on 2-pentanone in the GESTIS substance database of the IFA , accessed on December 26, 2019(JavaScript required) .
↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l Entry on 3-pentanone in the GESTIS substance database of the IFA , accessed on December 26, 2019(JavaScript required) .
↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l Entry on 3-methyl-2-butanone in the GESTIS substance database of the IFA , accessed on December 26, 2019(JavaScript required) .
↑ Entry on Pentan-2-one in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on December 26, 2019. Manufacturers or distributors can expand the harmonized classification and labeling .
↑ Entry on Pentan-3-one in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on December 26, 2019. Manufacturers or distributors can expand the harmonized classification and labeling .
↑ Entry on 3-methylbutanone in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on December 26, 2019. Manufacturers or distributors can expand the harmonized classification and labeling .

Web links

Commons : Pentanone - collection of images, videos and audio files

[GESTIS_1-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l Entry on 2-pentanone in the GESTIS substance database of the IFA , accessed on December 26, 2019(JavaScript required) .

[GESTIS_2-2] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l Entry on 3-pentanone in the GESTIS substance database of the IFA , accessed on December 26, 2019(JavaScript required) .

[GESTIS_3-3] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l Entry on 3-methyl-2-butanone in the GESTIS substance database of the IFA , accessed on December 26, 2019(JavaScript required) .

[CLP_100.003.208-4] Entry on Pentan-2-one in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on December 26, 2019. Manufacturers or distributors can expand the harmonized classification and labeling .

[CLP_100.002.265-5] Entry on Pentan-3-one in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on December 26, 2019. Manufacturers or distributors can expand the harmonized classification and labeling .

[CLP_100.008.423-6] Entry on 3-methylbutanone in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on December 26, 2019. Manufacturers or distributors can expand the harmonized classification and labeling .