食品添加劑 L-胱氨酸 L-Cystine

molecular formula ：c3h7no2s3 molecular weight ：185.28818
application：used in biochemical research, preparation of biological media, also used as food flavoring agents. biochemical reagents for the preparation of biological media. it is also an important component of amino acid infusion and complex amino acid preparations. as a feed nutrition fortifier, it is conducive to animal development, increase body weight and liver and kidney function, and improve fur quality. it can be used as a cosmetic additive to promote wound healing, prevent skin irritation and treat eczema.
property：white hexagonal plate crystal or white crystalline powder. solubility: soluble in dilute acid and alkali solution, very difficult to dissolve in water, insoluble in ethanol.
cas no. :56-89-3;24645-67-8
item
usp28
assay
98.5～101%
ph
5.5～6.5
specific rotation[a]d020
- 215°～ - 225°
chloride(cl)
≤0.02%
ammonium(nh4)
≤0.02%
sulfate(so4)
≤0.02%
iron(fe)
≤10ppm
heavy metals(pb)
≤10ppm
arsenic
≤1ppm
other amino acids
not detectable
loss on drying
≤0.20%
residue on ignition
≤0.10%