Description

• Application: Biotechnological production of L-Tryptophan: The study by Nefedova et al. explores the molecular mechanisms in metal oxide nanoparticle interactions with L-Tryptophan, highlighting its significance in nanoparticle synthesis, which is crucial for biotechnological applications in pharmaceutical manufacturing and life sciences (Nefedova et al., 2024).
• Analysis Note: Assay (perchloric acid titration, calculated on dried substance): 99.0 - 101.0 %Identity (IR-spectrum): passes testIdentity (specific rotation): passes testSpec. rotation (α 20/D, 10 g/l, water, calc. on dried substance): -30.0 to -33.0Appearance: white to almost white, crystalline or amorphous powderAppearance of solution (10 g/l, Hydrochloric acid 1 mol/l): clear and colorlessChloride (Cl): ≤ 200 ppmSulfate (SO₄): ≤ 300 ppmFe (Iron): ≤ 20 ppmNinhydrin-positive substances (LC)(any ninhydrin-positive impurity): ≤ 0.2 %Ninhydrin-positive substances (LC) (ammonium (570 nm)): ≤ 0.02 %Ninhydrin-positive substances (LC)(total impurities): ≤ 0.5 %Loss on drying (105 °C; 3 h): ≤ 0.3 %