Complaint
Product Name | Alpha-Lipoic Acid |
Color | Light yellow powder crystal |
Molecular formula | C8H14O2S2 |
Molecular weight | 206.32 |
Purity | 99% |
Melting point | 62°C |
Boiling point | 160-165ºC(lit) |
Flash point | 160-165°C |
CAS number | 1077-28-7 |
Solubility | Low solubility in water, about: 1 g / L (20 ° C). Soluble in 10% NaOH solution, soluble in aliphatic solvents. Soluble in ethanol, chloroform and ether. |
| Items | Specification | Test Method |
| Appearance | Light yellow crystalline powder | Organoleptic |
| Identification | Positive | HPLC |
| Melting point | 60.0~62.0 ºC | USP |
| Specific rotation | -1.0°to +1.0° | USP |
| Individual impurity | ≤0.10% | HPLC |
| Total impurities | ≤2.0% | HPLC |
| Limit of Polymer Content | Conforms to standard | TLC |
| Loss on drying | ≤0.20% | USP |
| Residue on ignition | ≤0.10% | USP |
| Particle Size | ≥90%thru #40 mesh | USP |
| Heavy Metals | ||
| Total Heavy metals | ≤10.0ppm | USP |
| Lead | ≤1.0ppm | ICP-MS |
| Arsenic | ≤ 1.0 ppm | ICP-MS |
| Cadmium | ≤1.0ppm | ICP-MS |
| Mercury | ≤0.1ppm | ICP-MS |
| Residual Solvent | ||
| Cyclohexane | ≤3880ppm | USP |
| Ethyl acetate | ≤500ppm | USP |
| Toluene | ≤50ppm | USP |
Microbiology | ||
| Total Plate Counts | ≤1,000cfu/g | USP |
| Moulds and Yeasts | ≤100cfu/g | USP |
| E.Coli | Negative/10g | USP |
| Salmonella | Negative/25g | USP |
| Staphylococcus aureus | Negative/10g | USP |
| Assay | 98.5%-101.0% | HPLC |
| Packing: N.W.:25kgs/drum, packed in double food grade plastic bags in fiber drum Storage: Clean & dry place. Do not be frozen. Keep away from straight light ans heat. Shelf life: 2years when properly stored | ||
