L-Arginine L-pyroglutamate-Arginine -pyroglutamate, also known as pirglutargine and arginine pidolate, is the -arginine salt of pyroglutamic acid. Arginine pyroglutamate is a delivery form of arginine.Physical and chemical properties-Arginine -pyroglutamate is a crystalline solid powder with a sour taste. It is soluble in cold water.HazardsThe compound is hazardous if ingested or inhaled in concentrated form. It is slightly hazardous in case of skin and eye contact.