L-Threonine(Feed Grade) Common names Threonine Property: Catalog Codes: SLT1276, SLT1846, SLT3139 CAS#: 72-19-5 RTECS: XO8590000 TSCA: TSCA 8(b) inventory: L-Threonine CI#: Not available. Synonym: L-2-Amino-3-hydroxybutyric acid Chemical Formula: C4H9NO3Specification:   Description StandardQ/FCCW 006-2004AppearanceWhite or light-brown Crystal or powderAssay≥98.5%Specific rotation[α]D20-26.00—-29.00Loss on drying≤1.0%Residue on ignition≤0.3%Ammonium(NH4+)≤0.04%Heavy metals(as Pb)≤20mg/kgArsenic(As)≤2mg/kgPH5.0-6.5