In-Wash Scent Booster. The subject product is described as original scent booster beads, packaged for retail sale. You state that these beads are placed directly into the washing machine, to provide a boost of long-lasting freshness and fragrance to clothing, towels, and linens. “In-Wash Scent Booster” is a surface-active preparation, comprised of Poloxamer 188 (CAS # 9003-11-6), Ceteareth-25 (CAS # 68439-49-6), and other substances.
[1] Please importantly note that only the relevant portion of the related is displayed above. You may refer to the said customs ruling for the entire ruling explanation.
[1]. https://rulings.cbp.gov/ruling/N317565