A 1128 (OTTO) Aluminium acetate, 99.9% Cas 142-03-0 - used as an antiseptic and astringent. A 1128 (OTTO) Aluminium acetate, 99.9% Cas 142-03-0 - used topically as wet dressing, compress, or soak for self-medication to temporarily relieve itching and soothe, particularly on wet or weeping lesions.