4-(Trimethylsiloxy)-3-penten-2-one
4-(Trimethylsiloxy)-3-penten-2-one (CAS: 13257-81-3) is an organic compound with a molecular weight of 172.30 g/mol. This trimethylsilyl ether of acetylacetone serves as a valuable building block in chemical synthesis, particularly for creating organosilicon carbofunctional compounds. Its properties make it suitable for various research and development applications within the organic synthesis field.
- IUPAC
- Acetylacetone enol trimethylsilyl ether,TMS acac
- Synonyms
- Acetylacetone enol trimethylsilyl etherTMS acac

Synthesis of Organosilicon Compounds
Used as a precursor in the synthesis of specific organosilicon carbofunctional compounds, such as 4-(3′-triethoxysilylpropylimino)pent-2-en-2-ol and 4-(3′-triethoxysilylpropylamino)pent-3-en-2-one.
Enol Ether Chemistry
As an enol ether derivative, it participates in reactions characteristic of this functional group, enabling further chemical transformations.
Organic Building Block
Provides a versatile structure for constructing more complex organic molecules in research laboratories and during process development.
| Molecular weight | 172.30 |
|---|---|
| Linear formula | (CH3)3SiOC(CH3)=CHCOCH3 |
| Assay | 97% |
| Boiling point | 66-68 °C/4 mmHg(lit.) |
| Density | 0.912 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.452(lit.) |
| Storage temperature | 2-8°C |
| Application | 4-(Trimethylsiloxy)-3-penten-2-one (trimethylsilyl ether of acetylacetone) has been used in the synthesis of isomers of organosilicon carbofunctional compounds:• 4-(3′-triethoxysilylpropylimino)pent-2-en-2-ol1• 4-(3′-triethoxysilylpropylamino)pent-3-en-2-one1 |


Hazard statements
- H226Flammable liquid and vapour
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 35 °C / 95 °F |
| Transport (UN / ADR) | UN 1224C 3 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 10-36/37/38 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
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-(Trimethylsiloxy)-3-penten-2-one primarily used for?
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4-(Trimethylsiloxy)-3-penten-2-one is primarily used as a building block in organic synthesis, particularly for the preparation of organosilicon carbofunctional compounds.
What are the CAS number and formula for 4-(Trimethylsiloxy)-3-penten-2-one?
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The CAS number is 13257-81-3 and its linear formula is (CH₃)₃SiOC(CH₃)=CHCOCH₃.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-(Trimethylsiloxy)-3-penten-2-one with an assay of 97%. This product is intended for research and chemical synthesis purposes and is not supplied as USP, BP, or EP grade.
How should 4-(Trimethylsiloxy)-3-penten-2-one be handled safely?
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This compound is flammable and can cause skin, eye, and respiratory irritation (H226-H315-H319-H335). Handle with appropriate personal protective equipment, including safety goggles, gloves, and use in a well-ventilated area. Store at 2-8°C.
How is 4-(Trimethylsiloxy)-3-penten-2-one packed, shipped, and exported?
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Tech Serve Solutions packs and ships chemicals according to international shipping regulations, including UN 1224C, Class 3, Packing Group III for flammable liquids. We are experienced global exporters.
How can I request a quote or sample for 4-(Trimethylsiloxy)-3-penten-2-one?
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To request a quote or sample, please use the contact form on our website or contact our sales department directly, providing the product name and CAS number (13257-81-3).
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