2-[(Trimethylsilyl)ethynyl]toluene
2-[(Trimethylsilyl)ethynyl]toluene (CAS: 3989-15-9) is an organosilicon compound with the linear formula (CH3)3SiC≡CC6H4CH3 and a molecular weight of 188.34 g/mol. This alkyne derivative is valuable as an organic building block in chemical synthesis. It is supplied by Tech Serve Solutions with an assay of 97%, suitable for research and development applications requiring precise molecular structures.
![2-[(Trimethylsilyl)ethynyl]toluene ((CH3)3SiC≡CC6H4CH3) — chemical structure, CAS 3989-15-9; Chemistry, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F3989-15-9.png&w=3840&q=75)
Organic Synthesis Intermediate
Utilised as a key building block in the synthesis of more complex organic molecules. Its trimethylsilyl-protected alkyne functionality allows for selective reactions in multi-step synthetic pathways.
Materials Science Research
Potentially employed in the development of novel materials where the rigid alkyne unit and aromatic ring can impart specific electronic or structural properties. Research into polymers and advanced materials may incorporate such structures.
Pharmaceutical Intermediate Development
Serves as a precursor in the exploratory synthesis of pharmaceutical compounds. The specific arrangement of the trimethylsilyl ethynyl and substituted toluene moieties can be incorporated into drug discovery programmes.
| Molecular weight | 188.34 |
|---|---|
| Linear formula | (CH3)3SiC≡CC6H4CH3 |
| Assay | 97% |
| Boiling point | 50-60 °C/0.5 mmHg(lit.) |
| Density | 0.880 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.5320(lit.) |

Hazard statements
- 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, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 90 °C / 194 °F |
| Transport (UN / ADR) | NA 1993 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 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 2-[(Trimethylsilyl)ethynyl]toluene used for?
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2-[(Trimethylsilyl)ethynyl]toluene is primarily used as an organic building block in chemical synthesis, particularly in the development of novel organic molecules, materials science research, and pharmaceutical intermediate development.
What is the CAS number and formula for 2-[(Trimethylsilyl)ethynyl]toluene?
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The CAS number for 2-[(Trimethylsilyl)ethynyl]toluene is 3989-15-9, and its linear formula is (CH3)3SiC≡CC6H4CH3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 2-[(Trimethylsilyl)ethynyl]toluene with an assay of 97%. We do not represent this product as USP, BP, EP, or any other pharmacopoeial grade.
What are the primary safety hazards associated with this compound?
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This compound is classified as a Warning with hazard statements including H315 (Causes skin irritation), H319 (Causes serious eye irritation), and H335 (May cause respiratory irritation). Appropriate personal protective equipment, such as eyeshields and gloves, should be worn, and handling should occur in a well-ventilated area or fume hood.
How is 2-[(Trimethylsilyl)ethynyl]toluene packed and shipped?
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2-[(Trimethylsilyl)ethynyl]toluene is packed according to industry standards for chemical reagents and is exported globally by Tech Serve Solutions, adhering to all relevant shipping regulations.
How can I request a sample or quote for 2-[(Trimethylsilyl)ethynyl]toluene?
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To request a sample or a quote, please contact the Tech Serve Solutions sales department through our website or by phone, providing your specific requirements and contact information.
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