3-(Trimethylsilyloxy)-1-butyne
3-(Trimethylsilyloxy)-1-butyne (CAS: 17869-76-0) is a valuable organic building block with the molecular formula C7H14O Si and a molecular weight of 142.27 g/mol. This terminal alkyne, featuring a trimethylsilyl protecting group, is primarily employed in organic synthesis and chemical research. Its unique structure allows for diverse chemical transformations, making it a useful intermediate in the construction of more complex molecules.
- IUPAC
- 2-(Trimethylsilyloxy)-3-butyne
- Synonyms
- 2-(Trimethylsilyloxy)-3-butyne

Organic Synthesis Intermediate
This compound serves as a versatile intermediate in complex organic synthesis pathways. The terminal alkyne functionality allows for various coupling reactions, while the silyl ether can be selectively removed when needed.
Building Block for Specialty Chemicals
3-(Trimethylsilyloxy)-1-butyne is utilised as a key building block in the synthesis of specialty chemicals and advanced materials. Its incorporation can introduce specific structural motifs into target molecules.
Research and Development
In academic and industrial research settings, this alkyne is used for exploring new synthetic methodologies and developing novel compounds with potential applications in pharmaceuticals or materials science.
| Molecular weight | 142.27 |
|---|---|
| Linear formula | (CH3)3SiOCH(CH3)C≡CH |
| Assay | 97% |
| Density | 0.818 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.405(lit.) |
| Storage temperature | 2-8°C |
| Melting point | 127-131 °C(lit.) |


Hazard statements
- H225Highly flammable liquid and vapour
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
- 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 | 5 °C / 41 °F |
| Transport (UN / ADR) | UN 1993BE 3 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | F,Xi |
| Risk statements (R) | 11-36/37/38 |
| Safety statements (S) | 16-26 |
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 3-(Trimethylsilyloxy)-1-butyne used for?
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3-(Trimethylsilyloxy)-1-butyne is primarily used as a building block and intermediate in organic synthesis and chemical research for constructing more complex molecules.
What are the CAS number and formula for 3-(Trimethylsilyloxy)-1-butyne?
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The CAS number for 3-(Trimethylsilyloxy)-1-butyne is 17869-76-0, and its linear formula is (CH3)3SiOCH(CH3)C≡CH.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3-(Trimethylsilyloxy)-1-butyne with an assay of 97%. This is a technical grade material and is not represented as USP, BP, EP, or other pharmacopoeial standards.
How should 3-(Trimethylsilyloxy)-1-butyne be handled safely?
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3-(Trimethylsilyloxy)-1-butyne is a flammable liquid and vapour (H225) and can cause skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335). Handle with appropriate personal protective equipment, including eyeshields, gloves, and a suitable respirator, in a well-ventilated area. Keep away from heat and open flames.
Is 3-(Trimethylsilyloxy)-1-butyne a controlled substance?
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Based on the provided data, there is no indication that 3-(Trimethylsilyloxy)-1-butyne is a controlled substance.
How is 3-(Trimethylsilyloxy)-1-butyne packed, shipped, and exported?
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3-(Trimethylsilyloxy)-1-butyne is shipped under UN 1993, Class 3, Packing Group II regulations. Tech Serve Solutions, as a global supplier and exporter, ensures compliance with all relevant shipping and export regulations.
How can I request a quote or sample for 3-(Trimethylsilyloxy)-1-butyne?
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To request a quote or sample, please contact the Tech Serve Solutions sales team through the website or designated contact channels, providing your specific requirements.
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