A hindered phenolic thiol that unites the radical-scavenging 2,6-di-tert-butylphenol skeleton with a nucleophilic para-mercapto group, delivering dual antioxidant and sulfur-centred reactivity in one molecule. Key utilisations include:
UV-stable thiol–ene optical coatings: 0.5–2 wt % in triallyl ethers gives clear films (Tg 120 °C, YI <2 after 1 000 h Q-UVB, n 1.58) for smartphone camera lenses and OLED barrier layers .
RAFT/MADIX chain-transfer agent: the bulky phenoxyl radical terminates growing chains, furnishing narrowly dispersed (Đ <1.15) fluorinated acrylate telechelics for 157 nm immersion-lithography top-coats.
Metal-selective flotation collector: the phenolic OH anchors to oxide surfaces while –SH chelates Cu²⁺/Pb²⁺ (log K 14.9/13.2), achieving 98 % selectivity over Fe at pH 8 in mine-tailings beneficiation.
Lubricant antioxidant: 0.3 wt % extends RPVOT induction time from 250 min to 550 min in Group III base oils, meeting DIN 51587 turbine specifications .
Redox-cleavable bioconjugate linker: the quinone–thiol redox potential (E°′ –0.15 V vs NHE) enables glutathione-triggered release of cytotoxic payloads in tumour cytosol .
Store under nitrogen at 2–8 °C, away from light and oxidants to suppress disulfide or quinone formation .
