Quality and Antioxidant Activity of Scrub Bath Soap with Addition of Eucheuma spinosum Algae Powder

A study was conducted to evaluate the quality and antioxidant activity of solid body soap with addition Eucheuma spinosum powder as a scrub. Soap made by saponification method between oil (a mixture olive (44%), coconut (24%), palm (32%)) NaOH. This consisted 4 treatments: (1) without adding algae (control) cold process (TC), (2) (SC), (3) hot (TH), (4) (SH). evaluated using Indonesian National Standard (SNI) 3532:2021 method, DPPH method. Parameters tested pH, total fat, water content, matter insoluble in ethanol, free fatty acids, chlorides, non-saponifiable fats, percentage inhibition. The results showed that scrub complied SNI for parameters content water, ethanol chloride; did not meet acid unsaponifiable fat. inhibition each bath at concentration 150 µg/mL solution 58.97% TC, 76.76% SC, 56.11% TH 70.13% SH. Scrub had higher than powder, both processes. Keywords: Antioxidant; spinosum; soap;