4-METHYL-2-PHENYL-2-PENTENAL
Synonym(s):cocoa pentenal
- CAS NO.：26643-91-4
- Empirical Formula: C12H14O
- Molecular Weight: 174.24
- MDL number: MFCD00051834
- EINECS: 247-869-4
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-04-03 14:17:14
What is 4-METHYL-2-PHENYL-2-PENTENAL?
Description
4-Methyl-2-phenyl-2-pentenal has a cocoa aroma. It is often used in chocolate and cocoα-type flavors. May be prepared by aldolic condensation of the corresponding aldehydes in the presence of a basic catalyst.
Chemical properties
4-Methyl-2-phenyl-2-pentenal has a cocoa aroma. It is often used in chocolate and cocoa-type flavors.
Occurrence
Reported found in baked and fried potato, peppermint oil, cocoa, black tea, roasted filberts, potato chips, sesame seed and malt
Preparation
By aldolic condensation of the corresponding aldehydes in the presence of a basic catalyst
Taste threshold values
Taste characteristics at 20 ppm: floral, sweet, waxy and cocoa-like with a honey nuance
Properties of 4-METHYL-2-PHENYL-2-PENTENAL
| Boiling point: | 96 °C0.7 mm Hg(lit.) |
| Density | 0.983 g/mL at 25 °C(lit.) |
| refractive index | n |
| FEMA | 3200 | 4-METHYL-2-PHENYL-2-PENTENAL |
| Flash point: | >230 °F |
| Odor | at 100.00 %. sweet cocoa nutty rose powdery |
| Sensitive | Air Sensitive |
| JECFA Number | 1473 |
| BRN | 2042583 |
| CAS DataBase Reference | 26643-91-4(CAS DataBase Reference) |
| EPA Substance Registry System | Benzeneacetaldehyde, .alpha.-(2-methylpropylidene)- (26643-91-4) |
Safety information for 4-METHYL-2-PHENYL-2-PENTENAL
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for 4-METHYL-2-PHENYL-2-PENTENAL
New Products
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