Alum Supplier — Water Treatment, Paper & Textile, Vadodara

Alum (aluminium sulphate, CAS 10043-01-3) from Drashti Chemicals Vadodara is the entry coagulant for community water filters, small ETPs and industrial pre-clarification across Gujarat. Lump and powder forms share chemistry; dissolution time and saturator design pick the form. We supply documented lots from Vadodara — stockist path, not a primary alum refinery.

Non-ferric grade matters when treated water is chlorinated for potable or reuse and iron tint shows up — check Fe on COA. Ferric alum paths exist for aggressive colour; do not assume every bag is non-ferric unless named on PO. Al₂O₃ content on COA drives dose math.

Jar-test before bulk: dose 30–150 mg/L typical band depending on turbidity and alkalinity; post-dose pH often drops — many plants pair alum with soda ash or hydrated lime. Sludge volume is higher than PAC — size clarifier and disposal accordingly.

50 kg bags are standard; trial bags available. Batch COA and MSDS every dispatch. No public price list — RFQ with lump vs powder, potable vs discharge-only, and monthly MT.

Versus PAC: poly aluminium chloride usually doses lighter with less sludge over a wider pH window — see PAC vs alum knowledge note. Versus ferric chloride: iron coagulant for colour-heavy textile effluent — different sludge colour and pH curve. We quote coagulation programs from one Vadodara desk.