or
Clelands Reagent ULTROL Grade Clelands Reagent ULTROL Grade. (Dithiothreitol DTT). White solid. PACKAGED UNDER INERT GAS. Purity: >99% by titration. Heavy metals: <1 ppm. Soluble in EtOH and H2O. Absorbance: (100 mM 280 nm): <0.05. Oxidized dithiothreitol