L-Cysteine hydrochloride monohydrate
Specification:
|
L-Cysteine hydrochloride monohydrate |
AJI92 |
USP39 |
|
Appearance |
White crystals or crystalline powder |
White or almost white, crystalline powder or colourless crystals |
|
Solubility |
--- |
Freely soluble in water, very slightly soluble in alcohol |
|
Assay |
99.0%～100.5% |
98.5%~101.0% |
|
Identification |
--- |
Conforms |
|
pH |
1.5～2.0 |
1.5~2.0 |
|
Optical rotation |
+5.5º~+7.0º |
+5.7°~ +6.8°（t=25℃） +5.5°~ +7.0°（t=20℃） |
|
State of solution |
≥98.0% |
--- |
|
Loss on drying |
8.5%～12.0% |
8.0%~12.0% |
|
Residue on ignition |
≤0.10% |
≤0.1% |
|
Chloride |
19.89%～20.29% |
--- |
|
Heavy metals |
≤10ppm |
≤10ppm |
|
Iron |
≤10ppm |
≤20ppm |
|
Sulfate |
≤0.02% |
≤0.03% |
|
Ammonium |
≤0.02% |
≤0.02% |
|
Arsenic |
≤1ppm |
≤0.5ppm |
|
Other amino acids |
Conforms |
--- |
|
Lead |
--- |
≤1ppm |
|
Cadmium |
--- |
≤0.5ppm |
|
Mercury |
--- |
≤0.1ppm |
|
Individual Impurities (Ninhydrin Positive) |
--- |
≤0.50% |
|
Total Impurities ( Ninhydrin Positive) |
--- |
≤2.0% |
|
Total viable count |
--- |
≤1000 cfu/g |
|
Yeast and Mould |
--- |
≤100 cfu/g |
|
Enterobacteriaceae |
--- |
Negative/10g |
|
Salmonella sp. |
--- |
Negative/10g |
|
Coliform bacteria |
--- |
Negative/g |
|
Escherichia coli |
--- |
Negative/g |
|
Staphylococcus aureus |
--- |
Negative/g |
|
Bacillus sp. |
--- |
Negative/g |
|
Clostridium sp. |
--- |
Negative/g |
Standard: AJI, USP
Function and application: It is mainly used in biochemical research, medicine for various alopecia, food seasoning, etc
Packaging: 25kg/bag(drum), others as required
MOQ：25kg
Shelf life: two years
Category
Tags
Recommended
Standard: CP, AJI, USP
Function and application: Flavoring agents, nutritional supplements, food additives, feed additives, pharmaceutical intermediates, flavor enhancers, etc
Packaging: 25kg/bag (drum), others as required
MOQ：25kg
Shelf life: two years
Standard: AJI
Function and application: Nutritional supplements, pharmaceutical intermediates, etc.
Packaging: 25kg/bag (drum), others as required
MOQ：25kg
Shelf life: two years
Standard: AJI, CP, USP, FCC
Function and application: Food additives, nutritional supplements, pharmaceutical intermediates, etc.
Packaging: 25kg/drum, others as required
MOQ：25kg
Shelf life: two years
Standard: AJI, CP, USP
Function and application: Food additives, nutritional supplements, pharmaceutical intermediates, pharmaceutical reagents, etc.
Packaging: 25kg/drum, others as required
MOQ：25kg
Shelf life: two years