BHMTPMPA is a high-efficient chelating scale inhibitor, it has good effect to carbonate and sulfate scale. BHMTPMPA has good water-soluble properties and heat tolerance. BHMTPMPA has high calcium ion tolerance in a wide pH ranges and temperature as high as 120C. BHMTPMPA can be used as scale and corrosion inhibitor for oilfield water, industrial circulating cool water and boiler.