Also available in 1 mL, 5 mg, 10 mg, 50 mg, 100 mg, 500 mg and bulk. Please contact Fisher for quotes. D-(-)-Lactic acid sodium (Sodium D-lactate) is an organic acid. It is a chiral molecule, consisting of two optical isomers, L-lactic acid and D-lactic acid, with the L-isomer being the most common in living organisms. D-(-)-Lactic acid sodium also is a microbial metabolite. Purity 98%