Seven SPAs were identified, with four analogues firstly reported in indoor dust. Three BHT transformation products (TPs) were also detected. Urban dust showed significantly higher ∑SPAs and ∑TPs compared with rural dust. Varied SPA composition profiles were found between urban and rural indoor dust. Estimated exposure to ∑SPAs via indoor dust ingestion was 0.37–7.97 ng/kg bw/day.