(E)-4-Phenyl-3-buten-2-one
[CAS# 1896-62-4]

Identification

• Classification: Chemical reagent >> Organic reagent >> Fatty ketone (including enol)
• Name: (E)-4-Phenyl-3-buten-2-one
• Synonyms: trans-4-Phenyl-3-buten-2-one; trans-Benzalacetone; trans-Benzylideneacetone; BAR
• Molecular Formula: C₁₀H₁₀O
• Molecular Weight: 146.19
• CAS Registry Number: 1896-62-4
• EC Number: 217-587-6
• FEMA: 2881
• SMILES: CC(=O)/C=C/C1=CC=CC=C1

Properties

• Water solubility: practically insoluble
• Density: 1.0±0.1 g/mL, Calc.^*, 1.038 g/mL (Expl.)
• Melting point: 39-42 ºC (Expl.)
• Index of Refraction: 1.563, Calc.^*
• Boiling Point: 260.8±9.0 ºC (760 mmHg), Calc.^*, 260-262 ºC (Expl.)
• Flash Point: 65.6 ºC, Calc.^*, 123 ºC (Expl.)

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software.

Safety Data

• Hazard Symbols: GHS07 Warning
• Hazard Statements: H315-H317-H319-H335
• Precautionary Statements: P261-P264-P264+P265-P271-P272-P280-P302+P352-P304+P340-P305+P351+P338-P319-P321-P332+P317-P333+P317-P337+P317-P362+P364-P403+P233-P405-P501

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Skin sensitization	Skin Sens.	1	H317
Skin irritation	Skin Irrit.	2	H315
Eye irritation	Eye Irrit.	2	H319
Specific target organ toxicity - single exposure	STOT SE	3	H335

Discovory and Applicatios

(E)-4-Phenyl-3-buten-2-one, also known as (E)-cinnamyl ketone, is an organic compound that belongs to the family of chalcones. It is characterized by the presence of a phenyl group attached to a conjugated alkene-ketone structure. This compound is typically produced through the aldol condensation reaction, where a phenylacetaldehyde reacts with acetone in the presence of a suitable catalyst.

The discovery of (E)-4-phenyl-3-buten-2-one dates back to early synthetic organic chemistry studies aimed at understanding conjugated systems and their reactivity. It has since been identified as a key intermediate in the synthesis of various natural and synthetic organic compounds.

The main applications of (E)-4-phenyl-3-buten-2-one are found in the fragrance and flavor industries. It has a sweet, floral, and somewhat spicy aroma, making it a valuable component in the formulation of perfumes, soaps, and cosmetic products. In the food industry, it is used as a flavoring agent to impart cinnamon-like or spicy notes to various products, including confectionery and baked goods.

Additionally, (E)-4-phenyl-3-buten-2-one has been studied for its potential use as an intermediate in the synthesis of other organic compounds, including pharmaceuticals and agrochemicals. It is also of interest in the field of materials science for its incorporation into polymers and other functional materials.

While the compound has not been extensively studied for its medicinal properties, its aromatic profile and chemical reactivity suggest potential uses in diverse chemical synthesis processes. It is generally considered to have low toxicity, though care should be taken when handling the compound, especially in concentrated forms.

In conclusion, (E)-4-phenyl-3-buten-2-one is a valuable compound in the fragrance, flavor, and chemical industries, with its sweet-spicy aroma contributing to its widespread use. Its role as a synthetic intermediate in organic chemistry further underscores its importance in chemical synthesis.