Zinc hydroxide and zinc hydroxide excellent in sustained release of zinc ion and method for producing the same

摘要

The present invention provides zinc chloride, which is useful as a starting material for pharmaceuticals, excellent in the sustained release of zinc ions when used as medicines, and excellent in stability as a drug substance, and a process for producing the same, At least one selected from the group consisting of zinc chloride, zinc hydroxide and zinc oxide having a Zn ²⁺ ion elution amount of 0.25 to 100 μg / m ² per surface area and a pH of less than 7.0 to 8.3 after the elution test by the stirring method of the hydrate Which can be used as a raw material for pharmaceuticals, and which is excellent in the sustained release of zinc ions.