L-ASPARAGINE MONOHYDRATE FOR BIOCHEMISTR

Analysis Note

Assay (perchloric acid titration, calculated on dried substance): 99.0 - 101.0 %Identity (IR-spectrum): passes testIdentity (specific rotation): passes testAppearance: white to almost white crystalline powder or colorless crystalsAppearance of solution (20 g/l, CO₂-free water): clear and colorlessSpec. rotation (α 20/D, 100 g/l, hydrochloric acid 3 mol/l, calc. on dried substance): +33.7 to +36.0Chloride (Cl): ≤ 200 ppmSulfate (SO₄): ≤ 200 ppmAs (Arsenic): ≤ 5 ppmCa (Calcium): ≤ 10 ppmCo (Cobalt): ≤ 5 ppmFe (Iron): ≤ 5 ppmK (Potassium): ≤ 5 ppmMg (Magnesium): ≤ 5 ppmNa (Sodium): ≤ 50 ppmPb (Lead): ≤ 10 ppmZn (Zinc): ≤ 5 ppmNinhydrin-positive substances (LC)(Aspartic acid): ≤ 0.5 %Ninhydrin-positive substances (LC)(any other ninhydrin-positive impurity): ≤ 0.3 %Ninhydrin-positive substances (LC) (ammonium (570 nm)): ≤ 0.02 %Ninhydrin-positive substances (LC)(total impurities): ≤ 0.8 %Loss on drying (130 °C, 3 h): 10.5 - 12.5 %

Packaging

100 g in Plastic bottle

10 kg in Plastic drum

1 kg in Plastic bottle