At Hebei Think-Do Environment Co.,ltd(formerly Desai Chemicals), we are devoted to creating environmental-friendly chemicals and solutions for a green and sustainable future. As the leading manufacturer of Polyaspartic acid salts in Asia and 2nd inventor of Iminodisuccinic acid sodium salt in the world, we enable our customers in nearly every industry to meet the needs of society with ecologically compatible, biodegradable functional polymers and chelants, though our science and innovation.