This invention, C1 - C4 hydroxy alkyl carboxylic acid and C5 - C18 alkyl mono carboxylic acid and non substitution or substitution and saturation or includes the anti-bacterial characteristic four component system of the specification which consists of with unsaturated C4- di-carboxylic acid and addition inorganic acid or organic acid, sterilization of acidity and/or it regards the composition for washing. As for the composition of this invention, form of the concentrate and the sterilization which is diluted and/or it is possible to exist with form of the solution for washing. As for the composition, the hard surface sterilization and/or the process which washes, desirably the food, dairy farming, the beverage, brewing and the plant facility in soft drink industry washing and/or putting washing which is sterilized (CIP) and/or putting sterilization (SIP) it can use for process.本発明は、C1~C4ヒドロキシアルキルカルボン酸と、C5~C18アルキルモノカルボン酸と、非置換又は置換、飽和又は不飽和C4-ジカルボン酸と、付加的な無機酸又は有機酸とから成る特定の抗菌性四成分系を含む、酸性の殺菌及び/又は洗浄用組成物に関する。本発明の組成物は、濃縮物の形態及び希釈された殺菌及び/又は洗浄用溶液の形態で存在することができる。組成物は、硬質表面を殺菌及び/又は洗浄するプロセス、好ましくは食品、酪農、飲料、醸造及び清涼飲料産業におけるプラント施設を洗浄及び/又は殺菌する定置洗浄(CIP)及び/又は定置殺菌(SIP)プロセスに使用することができる。
