Patent ID: 8394392

Claim:
An antibacterial agent composed of silver-containing aluminum sulfate hydroxide particles represented by the following formula (X-I): (Ag a B b-a ) b Al c A x (SO 4 ) y (OH) z .pH 2 O (X-I) wherein a, b, c, x, y, z and p satisfy 0.001≦a≦0.3, 0.7≦b≦1.35, 2.7<c<3.3, 0.001≦x≦0.5, 1.7<y<2.5, 4<z<7 and 0≦p≦5, respectively, B is at least one monovalent cation selected from the group consisting of Na + , NH 4 + , K + and H 3 O + , the total value (1b+3c) obtained by multiplying the valences by the numbers of mols of the cations satisfies 8<(1b+3c)<12, and A is an organic acid anion.