Merck 106664 Sodium Tartrate Dihydrate Water Standard For Volumetric Karl Fischer Titration (Volumetric Standard) Apura® Cas 6106-24-7Merck 106664 Sodium Tartrate Dihydrate Water Standard For Volumetric Karl Fischer Titration (Volumetric Standard) Apura® Cas 6106-24-7, Merck106664.0100