Patent ID: 8313780

Claim:
A silver-based inorganic antimicrobial agent represented by Formula (1) below containing zirconium pyrophosphate (ZrP 2 O 7 ) wherein, in the powder X-ray diffraction pattern, a relative intensity of an X-ray diffraction peak at 2θ=21.3° to 21.5° is 5 to 50, based on 100 of an X-ray diffraction peak intensity at 2θ=20.0° to 20.2°: Ag a M b Zr c Hf d (PO 4 ) 3 .n H 2 O (1) wherein M is at least one ion selected from an alkali metal ion, an ammonium ion, a hydrogen ion and an oxonium ion, a, b, c and d are positive numbers satisfying 1.75<(c+d)<2.2 and a+b+4(c+d)=9, and n is 2 or less.