Customization: | Available |
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CAS No.: | 1077-28-7 |
Formula: | C8h14o2s2 |
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Package | carton drum with two plastic bags inside |
Net weight | 25KG/Drum |
Storage | Sealed in cool and dry place to avoid moisture and light |
Shelf life | 2 years when properly stored |
Lead time | 1~3 days after confirmation |
TEST ITEMS | TEST STANDARDS | |
Assay by (HPLC) | 99.0% - 101 % (on the dried basis) | |
Identification | The retention time of the peak for alpha lipoic acid in the chromatogram of the Assay preparation corresponds to that in the chromatogram of the Standard preparation, as obtained in the Assay | |
Polymer content (TLC) | < 2 % | |
Appearance | Light yellow powder | |
Odor and taste | characteristic | |
Solubility (1N NaOH) | Light yellow and clear | |
Melting point | 60-62ºC | |
Residue on ignition | ≤0.10% | |
Loss on drying (Vacuum, 40ºC,3hrs) |
<0.20% | |
Specific rotation | - 1.0°~ + 1.0° | |
Relative substance | ||
6-8-epitrithiooctanoic acid | ≤0.10% | |
Single impurity | ≤0.10% | |
Total ash | ≤0.50 % | |
Heavy Metals | ≤10ppm | |
Residue solvents | ||
Cycloh-exane | ≤500ppm | |
ethyl ace-tate | ≤250ppm | |
Tolu-ene | ≤20ppm | |
Total aerobe amount | 1000 CFU/g | |
Mildrew and macrozyme | 100 CFU/g | |
E. coli / Salmonella | Absent | |
Golden yellowstaphylococcus | Absent |