L-Threonine - 72-19-5

Test items Specifications
Appearance White to pale brown crystalls or crystal powder
Assay( C4H9NO3 ) 98.8% min
Specific rotation [a]D20 -26.0°to -29.0°
Loss on drying 0.38% max
Residue on ignition 0.5% max
Heavy metals (Pb) 20mg/kg max
Arsenic 2mg/kg max
pH 5.3~6.7