L-Valine

for biochemistry

L-Valine for biochemistry. CAS 72-18-4, pH 5.5 - 6.5 (100 g/l, H₂O, 20 °C).

Assay (perchloric acid titration)≥ 99.0 %Identity (IR-spectrum)passes testAppearancewhite, crystalline powder or colorless crystalsAppearance of solution (50 g/l; water)clear and colorlessSpec. rotation (α 20/D, 50 g/l, hydrochloric acid 1 mol/l)+23.8 to +24.8Heavy metals (as Pb)≤ 0.001 %NH₄ (Ammonium)≤ 0.01 %Foreign amino acids≤ 0.5 %Other ninhydrine positive substances≤ 0.1 %