L-Threonine   CAS NO：72-19-5

Chemical Name	L-Threonine
Molecular Structure
Molecular Formula	C4H9NO3
Molecular Weight	119.12
Characteristics	White crystalling powder
Packing	25㎏/drum，25㎏/carton
Quality  Standard	AJI92/USP28/EP5/FCCIV
Specification
Specific rotation[a]D20°	-27.6°~-29.0°
State of solution	Clear and colorless
(Tranamittance)	≥98.0%
Chloride(Cl)	≤0.02%
Ammonium(NH4)	≤0.02%
Sulfate(SO4)	≤0.020%
Iron(Fe)	≤10PPm
Heavy metals(Pb)	≤10PPm
Arsenic(As2O3)	≤1PPm
Other amio acids	Chromatographically not detecatable
Loss on drying	≤0.10%
Residue on ignition (Sulfated)	≤0.10%
Assay	99.0～100.5%
PH	5.2～6.2