the present invention, aluminate and a composition comprising calcium hypochlorite, the amount of aluminate, with respect to the composition of 100 parts by weight, 1.0 part by mass or more and 2 parts by mass of less than compositions provided.본 발명은, 알루민산염 및 차아염소산칼슘을 포함하는 조성물로서, 알루민산염의 함유량이, 조성물 100질량부에 대하여, 1.0질량부 이상, 2질량부 미만인 조성물을 제공한다.