N－(Phosphonomethyl)iminodiacetic acid (PMIDA)

PMIDA is mainly used as a high-efficiency, low-toxic, broad-spectrum herbicide glyphosate intermediate. The direct synthesis of PMIDA by one-step oxidation has the advantages of simple technology and low production cost.

Pure and industrial products of PMIDA are white crystals, melting point 210 ° C (decomposition), slightly soluble in water, insoluble in organic solvents such as ethanol, acetone, ether, benzene. It can form salts with alkalis and amines.

Its synthetic technology use iminodiacetonitrile, phosphorous acid, formaldehyde, liquid alkali and the like as main raw materials, and is obtained by alkali hydrolysis, acidification and condensation.