Name: Di-p-toluoyl-L-tartaric acid monohydrate CAS No.:71607-31-3 Short form: L-(-)-DTTA.H2O Formula: C20H20O9 Formula Weight: 404.33 Appearance: White or off-white crystalline powder Uses: used in chiral separation racemization amine-group compound such as (-)-quinpirole. Specification: Chemical purity: ≥99.0% Optical rotation: [α]D20=-140°--146°(C=1.0, MeOH)