4-Phenyl-3-buten-2-one
4-Phenyl-3-buten-2-one (CAS: 122-57-6) is a light yellow crystalline solid with the molecular formula C10H10O and a molecular weight of 146.19 g/mol. This compound, also known as benzalacetone or methyl styryl ketone, is primarily utilised as a key building block in organic synthesis and chemical manufacturing. Its characteristic structure makes it valuable in the creation of more complex molecules within research and industrial settings.
- IUPAC
- Benzalacetone,Benzylideneacetone,Methyl styryl ketone
- Synonyms
- 2-Butenone, 4-phenyl- (2CI)Ketone, methyl styryl (7CI)1-Phenyl-1-buten-3-one2-Phenylvinyl methyl ketone2-Phenylvinyl methyl ketone4-Phenyl-3-buten-2-one4-Phenyl-3-butene-2-one4-PhenylbutenoneAcetocinnamoneBenzalacetoneBenzylideneacetoneMethyl 2-phenylvinyl ketoneMethyl phenylvinyl ketoneMethyl styryl ketoneMethyl β-styryl ketoneNSC 5605Styryl methyl ketone

Organic Synthesis Intermediate
4-Phenyl-3-buten-2-one serves as a versatile intermediate in the synthesis of various organic compounds. Its reactive alpha,beta-unsaturated ketone moiety allows for diverse chemical transformations.
Chemical Research
It is employed in academic and industrial research laboratories for developing new chemical entities and exploring novel synthetic pathways. Its properties make it a useful starting material for many reactions.
Building Block for Fine Chemicals
This compound acts as a fundamental building block in the production of fine chemicals. It is integral in multi-step syntheses requiring specific structural elements.
| Molecular weight | 146.19 |
|---|---|
| Linear formula | C6H5CH=CHCOCH3 |
| Assay | 99% |
| Boiling point | 260-262 °C(lit.) |
| Solubility | alcohol: freely solublebenzene: freely solublechloroform: freely solublediethyl ether: freely solublepetroleum ether: very slightly solublewater: very slightly soluble |
| Vapour pressure | 0.01 mmHg (25 °C) |
| Melting point | 39-42 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H317May cause an allergic skin reaction
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Flash point | 123 °C / 253.4 °F |
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38-43 |
| Safety statements (S) | 22-26-36/37 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Description | Light Yellow Crystals |
|---|
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 4-Phenyl-3-buten-2-one used for?
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4-Phenyl-3-buten-2-one is primarily used as an intermediate in organic synthesis and as a building block in chemical research for creating more complex molecules.
What is the CAS number and molecular formula for 4-Phenyl-3-buten-2-one?
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The CAS number is 122-57-6 and the molecular formula is C10H10O.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Phenyl-3-buten-2-one with an assay of 99%. This product is supplied for research and development or further manufacturing purposes. TSS does not represent this product as USP, BP, or EP grade.
How should 4-Phenyl-3-buten-2-one be handled safely?
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4-Phenyl-3-buten-2-one is a Warning substance that can cause skin irritation (H315), allergic skin reaction (H317), eye irritation (H319), and respiratory irritation (H335). Appropriate personal protective equipment, including a dust mask (N95), eyeshields, face shields, and gloves, should be worn. Ensure adequate ventilation.
How is 4-Phenyl-3-buten-2-one packed and shipped?
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4-Phenyl-3-buten-2-one is carefully packed and exported by TSS in compliance with international shipping regulations for chemical substances.
How can I request a sample or quote for 4-Phenyl-3-buten-2-one?
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To request a sample or a quotation for 4-Phenyl-3-buten-2-one, please contact the Tech Serve Solutions sales team through our website or by phone.
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