Characterization of Extract, Formulation and Evaluation of Hand Sanitizer from Red Betel Leaf Extract (Piper crocatum L.) - Aryantini, Dyah; Muslich, Faisal; Hardini, Pri; Sariwati, Atmira; Lailiyah, Munifatul; Sari, Fita; Hesturini, Rosa (Jurnal Sintesis: Penelitian Sains, Terapan dan Analisisnya, 2025)