L-cystine

We are offering l-cystine.
Name:l-cystine
1.cas no.:56-89-3
2.white crystal or crystalline powder; tasteless
3.assay 98.5~101.0 %
properties:white crystal or crystalline powder, odorless, flavorless, almost insoluble in water or ethanol, soluble in diluted acid or basic hydroxide solutions.
Specific rotatory power[] d20 -215o -225o
clarity 98.0%
ammonium salt[nh4] 0.02%
chloride[cl] 0.02%
residue on ignition 0.10%
sulfate[so4] 0.02%
iron salt[fe] 10 ppm
heavy metal[pb] 10 ppm
arsenic salt 1 ppm
other amino acid color layer can not be checked out.
Loss on drying 0.20%
content 98.5 -101.0%
use:used in biochemical research, nutrient; cure congenital cystinuria etc.
Storage:stored in sealed container at room temperature.