4-tert-Butoxystyrene
4-tert-Butoxystyrene (CAS: 95418-58-9) is a functionalised styrene monomer with the molecular formula H₂C=CHC₆H₄OC(CH₃)₃ and a molecular weight of 176.25 g/mol. This compound is primarily utilised in materials science and polymer chemistry. Its styrenic unsaturation allows for polymerisation, while the tert-butoxy group can offer unique solubility or reactivity characteristics in resulting polymers. It is supplied by TSS with an assay of 99%.

Monomer for Polymer Synthesis
4-tert-Butoxystyrene serves as a reactive monomer in polymerisation processes. It can be homopolymerised or copolymerised with other monomers to create specialised polymers with tailored properties.
Materials Science Research
The unique structure of 4-tert-Butoxystyrene makes it a valuable building block in materials science research. It may be incorporated into polymer backbones or side chains to modify material characteristics.
Functionalised Polymer Development
This compound enables the development of functionalised polymers where the tert-butoxy group can be further modified or contribute to the final material's performance, such as altered solubility or thermal stability.
| Molecular weight | 176.25 |
|---|---|
| Linear formula | H2C=CHC6H4OC(CH3)3 |
| Assay | 99% |
| Boiling point | 72-73 °C/0.1 mmHg(lit.) |
| Density | 0.936 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.524(lit.) |
| Contains / stabiliser | 200 ppm 4-tert-butylcatechol as inhibitor |
| Melting point | −38 °C(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 | 97 °C / 206.6 °F |
| 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 4-tert-Butoxystyrene used for?
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4-tert-Butoxystyrene is used as a monomer in polymer synthesis and in materials science research for developing functionalised polymers.
What are the CAS number and formula for 4-tert-Butoxystyrene?
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The CAS number for 4-tert-Butoxystyrene is 95418-58-9 and its linear formula is H₂C=CHC₆H₄OC(CH₃)₃.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-tert-Butoxystyrene with an assay of 99%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
How should 4-tert-Butoxystyrene be handled safely?
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Warning: This compound causes skin irritation, serious eye irritation, and may cause respiratory irritation (H315-H319-H335). Always use with appropriate personal protective equipment, including eyeshields, gloves, and a suitable respirator. Handle in a well-ventilated area.
Is 4-tert-Butoxystyrene available for international export?
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Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals, including 4-tert-Butoxystyrene, to customers worldwide.
How can I request a sample or quote for 4-tert-Butoxystyrene?
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To request a sample or a quotation for 4-tert-Butoxystyrene, please contact our sales department through the website or by phone.
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