L-Aspartic Acid Manufacture Standards: AJI92,USP26,EP5,FCC4 L-Aspartic AcidIndications and UsageAspartic acid (abbreviated as Asp or D; Asx or B represent either aspartic acid or asparagine ... HOOCCH(NH2)CH2COOH. The carboxylate anion, salt, or ester of aspartic acid is known as aspartate. The L-isomer of aspartate is one of ...