L-CYSTINEL-Cystine CAS:56-89-3 l Discription: White crystals or crystalline powder, odor, less tastaless Using: It is the raw material used in medicine. Food chemical industry and used for biochemical studies. Specification: State of solution : 98%min (transmittance) assay :99%min loss on drying :0.20%max. Residue on ignition :0.10%max. Iron(Fe) :0.01%max Heavy metals(Pb) :0.01%max. Chloride(CL) :0.02%max. Specific rotation -215-225C Tyrosine : no Packing in 25kgs net each in pp bags with plastic bag lining inside.