Valproic acid (Dipropylacetic Acid) (Standard) is an analytical standard for valproic acid. This product is intended for research and analytical applications. Valproic acid is an orally active HDAC inhibitor (IC50=0.5-2 mM), inhibits the activity of HDAC1 (IC50=400 µM), and induces the degradation of HDAC2. Valproic acid activates Notch1 signaling and inhibits the proliferation of small cell lung cancer (SCLC) cells. Valproic acid is used in the study of epilepsy, bipolar disorder, metabolic diseases, HIV infection, and migraine[1][2][3][4][5][6][7].