L-tryptophan

L-threonine cas no.: 72-19-5 molecular formula: c4h9no3 molecular weight: 119.12 use: it is a nutrition enhancer packing: 25kg fiber drum, or upon clients\' requests. storage: avoid light, stored in dry and cool place; no mixing with toxic and hazardous articles. it is non-dangerous article, and can be transported as common chemicals; handle with care; protect against sunlight and rain.