Patent ID: 8231883

Claim:
A silver-based inorganic antimicrobial agent containing hexagonal zirconium phosphate salt particles represented by Formula (A) below and having a particle size distribution wherein particles with a particle size of 10 μm to 100 μm are 90% or more on a volume basis: Ag a M b Zr c Hf d (PO 4 ) 3 .n H 2 O (A) wherein M represents at least one ion selected from an alkali metal ion, an alkaline earth metal ion, an ammonium ion, a hydrogen ion and an oxonium ion, a, b, c and d are values satisfying 1.75<c+d<2.25, and a+b+4(c+d)=9 provided that M is monovalent, and a+2b+4(c+d)=9 provided that M is divalent, and a, b, and c are positive numbers, d is zero or a positive number, and n is zero or a positive number of 2 or less.