Hóa chất L-Tryptophan cho hóa sinh Merck 1083740500 (C₁₁H₁₂N₂O₂, chai nhựa 500g) DEEP52 https://yeuhangduc.vn/
Mô tả
CAS #. : 73-22-3
EC number: 200-795-6
Hill Formula: C₁₁H₁₂N₂O₂
Molar Mass: 204.23 g/mol
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 %
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