Feed Grade L-Tryptophan

[cas no.]: 73-22-3 [molecular weight]:204.23 chemical formula]: c11h12n2o2 item standard test result purity on a dry matter basis% more than 98.0 99.7 ph (1% solution) 5.0--7.0 5.92 residue on ignition % less than 0.5 0.08 loss on drying % less than 0.5 0.35 specific rotation [î±]d20 -29.0â°- -32.8â° -31.6.