Synonyms: CITRIC-2,2,4,4-D4 ACID;CITRIC ACID (2,2,4,4-D4);Citric-2,2,4,4-d4 acid, 98 atom % D, 98% CP;2-Hydroxy-1,2,3-propanetricarboxylic-d4 Acid;2-Hydroxypropan-d4-1,2,3-tricarboxylic Acid;3-Carboxy-3-hydroxypentane-d4-1,5-dioic Acid;Aciletten-d4;Celenex 3P6-d