EED inhibitor-1 is a specialty chemical, specifically a small molecule inhibitor targeting the Embryonic Ectoderm Development (EED) protein, a component of the Polycomb Repressive Complex 2 (PRC2) involved in epigenetic regulation. It is used in biochemical and pharmacological research for studying histone methylation and gene silencing. This is not a commodity chemical but a niche research reagent with purity ≥98%.