bids are invited for bleaching powder - bleaching powder gr.-i as per is code no. 1065- 1989 suitable for chlorination of drinking water packed in zinc coated drum ( isi ) having two liner and tied at and separately with nylon rope for the protection during transit. the packages use shall be free from dirt or other foreign materials which are likely to cause decomposition of stable bleaching powder ( each drums containing 50 kg quantity ) . , ferric alum - ferric alum gr.-iv, with additional requirement for purification of water containing lead ( aspb ) 30 pp max. and arsenic ( as203 ) 6 pp max. confirming to is: 299:2012 5th revision , ordinary portland cement - ordinary portland cement 43 grade conforming to is:8112 from reputed manufactures of cement having production capacity of one million tones or more per annum total quantity : 1