| Identification | More | [Name]
3-Methyl-2-butenal | [CAS]
107-86-8 | [Synonyms]
3,3-DIMETHYLACROLEIN
3,3-DIMETHYLACRYLADEHYDE
3,3-DIMETHYL-ACRYLALDEHYDE
3-METHYL-2-BUTENAL
3-METHYLCROTONALDEHYDE
FEMA 3646
PRENAL
SENECIALDEHYDE
2-Butenal, 3-methyl-
3-methyl-2-butena
3-methyl-2-butenal (prenal)
3-methyl-but-2-enal
beta,beta-Dimethylacrolein
beta-Methylcrotonaldehyde
Crotonaldehyde, 3-methyl-
Senecioaldehyde
-Methyl-2-Butenal
3-Methyl-2-Crotonaldehyde
3-METHYLCROTONALDEHYDE(3-METHYL-2-BUTENAL)
3,3-Dimethylacrolein, 3,3-Dimethylacrylaldehyde, 3-Methyl-2-butenal, 3-Methylcrotonaldehyde, Prenal | [EINECS(EC#)]
203-527-6 | [Molecular Formula]
C5H8O | [MDL Number]
MFCD00010291 | [Molecular Weight]
84.12 | [MOL File]
107-86-8.mol |
| Chemical Properties | Back Directory | [Appearance]
clear colorless to light yellow liquid | [Melting point ]
-20°C | [Boiling point ]
133-135 °C (lit.) | [density ]
0.872 g/mL at 25 °C(lit.)
| [vapor pressure ]
7 mm Hg ( 20 °C)
| [FEMA ]
3646 | [refractive index ]
n20/D 1.462(lit.)
| [Fp ]
93 °F
| [storage temp. ]
2-8°C
| [solubility ]
soluble | [form ]
Liquid | [color ]
Clear colorless to light yellow | [Odor]
at 1.00 % in dipropylene glycol. sweet fruity pungent brown nutty almond cherry | [Odor Type]
fruity | [Water Solubility ]
soluble | [Sensitive ]
Air Sensitive | [JECFA Number]
1202 | [Merck ]
14,8448 | [BRN ]
1734740 | [LogP]
0.53 at 25℃ | [CAS DataBase Reference]
107-86-8(CAS DataBase Reference) | [NIST Chemistry Reference]
3-methyl-2-butenal(107-86-8) | [EPA Substance Registry System]
107-86-8(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
Xn,Xi | [Risk Statements ]
R10:Flammable.
R22:Harmful if swallowed.
R37/38:Irritating to respiratory system and skin .
R41:Risk of serious damage to eyes.
R43:May cause sensitization by skin contact.
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing .
S37/39:Wear suitable gloves and eye/face protection .
S16:Keep away from sources of ignition-No smoking . | [RIDADR ]
UN 1989 3/PG 3
| [WGK Germany ]
2
| [F ]
9-13-23 | [TSCA ]
Yes | [HazardClass ]
3 | [PackingGroup ]
III | [HS Code ]
29121900 |
| Hazard Information | Back Directory | [Description]
3-Methyl-2-butenal has an almond odor. | [Chemical Properties]
3-Methyl-2-butenal has an almond odor | [Chemical Properties]
clear colorless to light yellow liquid | [Uses]
3-Methyl-2-butenal is used in small quantities as food flavor in alcoholic beverages, chewing gums, confection frosting, frozen dairy, fruit ice, gelatin pudding, hard and soft candy and jam jelly. Used in daily flavor, and cosmetic flavor in perfumes. A starting material for the synthesis of vitamin A. | [Definition]
ChEBI: An enal consisting of but-2-ene with a methyl substituent at position 3 and an oxo group at position 1. | [Taste threshold values]
Taste characteristics at 25 ppm: sweet, fruity and green with a nutty and cherry background.
| [General Description]
3-Methylcrotonaldehyde is an α, β-unsaturated aldehyde. Electrochemical dimerization of 3-methylcrotonaldehyde was reported. The hydrogenation of 3-methylcrotonaldehyde over Ru, Pt and Rh was investigated. | [Purification Methods]
This flammable oil oxidises readily and should be fractionated under N2. It should be stored under N2 and/or vacuum. The UV has max at 235.5nm. The semicarbazone has m 221-222o (from MeOH) and the 2,4-dinitrophenylhydrazone has m 184-185o (from MeOH). [Forbes & Skilton J Org Chem 24 436 1959, Beilstein 1 III 2990, 1 IV 3464.] |
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