L-Isoleucine (Ph. Eur., USP) pure, pharma grade
Content: 1 KGM
Physical Description:
Solid
• All amino acids from AppliChem are of non-animal origin!
Specification: Assay (titr., calc. on dried subst.): 98.5 - 101.0 %
a20°C/D; 4 %; 250 g/L HCl; calc. on dried subst.: +40.0° - +43.0°
Appearance of solution: passes test
Identity: passes test
Heavy metals (as Pb):?max. 0.0015 %
Sulfated ash:?max. 0.1 %
Loss on drying (3 h; 105°C):?max. 0.3 %
a25°C/D; 4 %; 6 N HCl: +38.9° - +41.8°
pH (1 %; H2O): 5.5 - 7.0
Ammonium:?max. 0.02 %
Chloride:?max. 0.02 %
Sulfate:?max. 0.03 %
Fe:?max. 0.001 %
Ninhydrin positive substances (HPLC):
Valine:?max. 0.3 %
Leucine:?max. 0.3 %
Any other ninhydrin-pos. Subst.:?max. 0.2 %
Total impurities:?max. 1.0 %
Ninhydrin positive substances (TLC):
Valine:?max. 0.5 %
Total impurities:?max. 2 %