4-tert-Butoxystyrene NEW

•  4-tert-Butoxystyrene   95418-58-9

Synonyms

• p-tert-Butoxystyrene

• 1-(tert-Butoxy)-4-ethenylbenzene

• 1-tert-Butoxy-4-vinylbenzene

• 4-tert-Butoxystyrene (stabilized with TBC)

• 1-(1,1-Dimethylethoxy)-4-ethenylbenzene

• 4-t-Butoxystyrene

Physicochemical Properties

• Molecular Formula: C₁₂H₁₆O

• Molecular Weight: 176.25 g/mol

• Physical State: Colorless to pale yellow liquid

• Melting Point: −38 °C (lit.)

• Boiling Point: 256.8±9.0 °C at 760 Torr; 72–73 °C at 0.1 mmHg (lit.)

• Density: 0.936 g/mL at 25 °C (lit.)

• Refractive Index: n²⁰/D 1.524 (lit.)

• Flash Point: 97 °C (207 °F, closed cup)

• Vapor Pressure: 17.999 Pa at 20 °C

• Solubility: Insoluble in water; soluble in common organic solvents (toluene, THF, dichloromethane)

• Stabilizer: Typically contains 200 ppm 4-tert-butylcatechol (TBC) as polymerization inhibitor

• Storage: 2–8 °C, under inert gas (nitrogen/argon), air-sensitive

Applications

• Monomer for synthesis of poly(4-tert-butoxystyrene) (PtBSt), a key photoresist polymer

• Precursor to poly(4-vinylphenol) (via deprotection) for advanced lithography and electronic materials

• Building block for functional polymers, adhesives, and coatings

• Cross-linking agent and reactive intermediate in organic synthesis

• Used in styrenic copolymers for high thermal stability and etch resistance

• HS 29093090