Water treatment reagents — coagulants, flocculants, and auxiliary compositions for the purification of drinking, technical, and wastewater. Coagulants neutralize the charge of colloidal particles, flocculants aggregate them into flakes for sedimentation. Coagulants: aluminum sulfate Al₂(SO₄)₃, ferric chloride FeCl₃, polyaluminum chloride (PAC). Flocculants: polyacrylamide (cationic, anionic, nonionic), polyDADMAC. Coagulant dosage: 20–100 mg/l (depending on turbidity). Flocculant dosage: 0.5–5 mg/l. Packaging: 25 kg bags (dry), 20 L cans, 1000 L IBC containers (solutions). Coagulant dosage is determined by jar test: a series of beakers with different dosages → assessment of clarity, sedimentation rate, residual aluminum. Flocculant is selected based on charge and molecular weight. Storage: polyacrylamide — dry warehouse, protection from moisture (hygroscopic); PAC — frost-free premises. Shelf life 12–24 months. Documentation: quality certificate, state registration certificate (for drinking water supply). Deliveries by road transport.