PROBLEM TO BE SOLVED: To provide a solid volatile formulation whose use end point can be clearly recognized from its appearance.SOLUTION: The solid volatile formulation contains: a composition that contains an agent, water, and a thiazoline based compound represented by the general formula (1) in the figure (where Rand Reach independently represent H or Cl, or together form a benzene ring； and Rrepresents a C1-10 alkyl group), and has a pH of 7-12； and a crosslinked water-absorbing resin comprising an isobutylene-maleic acid anhydride copolymer.SELECTED DRAWING: Figure 1【課題】使用終点を外観上明確に認識可能な固形揮散製剤の提供すること。【解決手段】薬剤、水及び下記一般式（１）【化１】 （式中、Ｒ１、Ｒ２は各々独立してＨ又はＣｌを示すか、一体となってベンゼン環 を形成し、Ｒ３は炭素数１～１０のアルキル基を示す）で示されるチアゾリン系化合物を含有し、ｐＨが７～１２である組成物と、イソブチレン－無水マレイン酸共重合体を含む架橋型吸水性樹脂とを含有する固形揮散製剤。【選択図】図１
