4-(Dimethyl-t-butylsilyloxy)butan-1-ol-d8 is a labelled analogue of 4-(Dimethyl-tert-Butylsilyloxy)butan-1-ol (D468260), and an intermediate in synthesizing rac α-Aminoadipic Acid-d6 (A580502), which is a labelled amino acid isolated from Cholera vibrio.