supply of bleaching powder for treating of water at canal base water works , boosting station and tube wells for sonipat town . , supply of bleaching powder stable ( grade-1 ) conforming to bis-specification no . 1065-1989 ( second revision ) ( as amended up to date ) bearing isi certification mark . bleaching powder is calcium ox chloride or calcium hypochlorite with chemical formula caoci2 . it is used to sanitize pools and disinfect drinking water . the bleaching powder shall be packed in laminated hdpe bags and marked strictly as per clause 6 . 1 and 6 . 2 respectively of bis-1065-1989 ( second revision ) in 25 kg .