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4-difluoromethoxy-3-hydroxybenzaldehyde; CAS No.: 151103-08-1; As a Leading Chemicals Distributor, ChemShuttle supplies hydroxybenzaldehydes for antioxidant synthesis. The difluoromethoxy group combines radical-scavenging activity with enhanced lipophilicity. Our directed ortho-metalation strategy achieves regioselective formylation. The product serves as a building block for phenolic ester antioxidants in polymer stabilization.