Albuminar contains the active ingredient human albumin, which is formulated as a 20% sterile aqueous solution for intravenous administration. It is prepared from pooled human plasma using a cold alcohol fractionation method. The solution is stabilized with sodium caprylate and sodium acetyltryptophanate, and includes sodium ions as a key inactive component. Albuminar is intended to increase blood volume by enhancing the colloid osmotic effect, approximately four times that of normal human plasma.