A bifunctional aromatic thiol bearing two strongly electron-donating methoxy groups (pKₐ 6.4). It is a key building block for:
High-refractive-index poly(aryl sulfide) resins (nD ≈ 1.68) used in 5G lens substrates and OLED encapsulation films;
Electron-rich aryl-sulfide ligands for Cu- or Pd-catalysed cross-couplings and photoredox transformations;
Self-assembled monolayers (SAMs) on gold, providing hydrophobic yet polar surfaces for SERS sensors and MEMS anti-stiction layers;
Synthesis of 2,5-dimethoxy-phenethyl thio-ethers employed as fragrance fixatives and antioxidant additives.
Store under nitrogen at 2–8 °C, protect from oxidants to prevent disulfide formation.
