N-Nitrosoglyphosate

"N"-Nitrosoglyphosate is the nitrosamine degradation product and synthetic impurity of glyphosate herbicide.
The US EPA limits "N"-nitrosoglyphosate impurity to a maximum of 1 ppm in glyphosate formulated products. "N"-Nitrosoglyphosate can also form from the reaction of nitrates and glyphosate. Formation of "N"-nitrosoglyphosate has been observed in soils treated with sodium nitrite and glyphosate at elevated levels, though formation in soil is not expected at under typical field conditions.