Vasu Chemicals supplies Antiscalants Reverse Osmosis Water Treatment. Vasu Chemicals is an ISO 9001:2008 certified company. Vasu Chemicals manufactures a wide range of chemical & formulations. Antiscalants Reverse Osmosis Water Treatment is designed to eliminate scale and reduce fouling in membrane systems, regardless of the feed water source. Antiscalants Reverse Osmosis Water Treatment is phosphate free and environment friendly.