Description L-Proline, 98+% (TLC), Certified, 100g For Research & Development Not for drug, human, animal, or food use Certificate of Analysis: Appearance White solid Purity 98+% (TLC) Nitrogen 12.18% [α]D = -84.9°C = 24 in H2O at 22°C CAS: 147-85-3 FORMULA: C₅H₉NO₂