Particle for immunoturbidimetry, reagent, test kit, and method of detecting target substance

Abstract

Provided are a particle for immunoturbidimetry, a reagent, a test kit, and a method of detecting a target substance that can each detect a trace component in a low-concentration region and improve storage stability. The particle for immunoturbidimetry is a particle for immunoturbidimetry including a first resin and titanium oxide, wherein the particle for immunoturbidimetry includes a first layer containing the first resin and a second layer containing the titanium oxide, wherein the second layer is arranged outside of the first layer, wherein the titanium oxide has a density of 3.40 g/cm3 or less, and wherein a content of the titanium oxide in the particle for immunoturbidimetry is 10 mass % or more and 80 mass % or less.

Dependencies are inferred from the claim text.