1.08374

L-Tryptophan

for biochemistry

• Synonym(s): L-Tryptophan, Trp
• Empirical Formula (Hill Notation): C₁₁H₁₂N₂O₂
• CAS Number: 73-22-3
• Molecular Weight: 204.23
• MDL number: MFCD00064340
• UNSPSC Code: 12352209
• EC Index Number: 200-795-6
• NACRES: NA.21

Properties

• Quality Level: 100
• form: solid
• potency: 16000 mg/kg LD₅₀, oral (Rat)
• pH: 5.5-7.0 (20 °C, 10 g/L in H₂O)
• mp: 290 °C (decomposition)
• solubility: 10 g/L
• bulk density: 400 kg/m³
• storage temp.: 2-30°C
• InChI: 1S/C11H12N2O2/c12-9(11(14)15)5-7-6-13-10-4-2-1-3-8(7)10/h1-4,6,9,13H,5,12H2,(H,14,15)
• InChI key: QIVBCDIJIAJPQS-UHFFFAOYSA-N

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 test
Identity (specific rotation): passes test
Spec. rotation (α 20/D, 10 g/l, water, calc. on dried substance): -30.0 to -33.0
Appearance: white to almost white, crystalline or amorphous powder
Appearance of solution (10 g/l, Hydrochloric acid 1 mol/l): clear and colorless
Chloride (Cl): ≤ 200 ppm
Sulfate (SO₄): ≤ 300 ppm
Fe (Iron): ≤ 20 ppm
Ninhydrin-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 %

Safety Information

• Storage Class: 13 - Non Combustible Solids
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable