ShineHerb
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Ergothioneine (EGT, L-Ergothioneine, CAS: 497-30-3) is a rare, naturally occurring sulfur-containing amino acid derived from histidine. It is mainly produced by mushrooms, actinobacteria, and cyanobacteria; humans cannot synthesize it and must obtain it from diet or supplements. As a stable, high-potency antioxidant, it is widely used in cosmetics, food, and health supplements.
| Items | Specifications | Results |
|---|---|---|
| Physical and Chemical Property | ||
| Appearance | White crystal powder | Conforms |
| Assay | ≥99.0% | 99.2% |
| Loss on Drying | ≤0.5% | 0.087% |
| Melting point | 275°C~277°C | 276°C |
| Optical rotation | [a]D≥(+)122°(c=1,H2O) | 99.39% |
| Elemental analysis | C:47.14±0.3% H:6.59±0.3% N:18.33±0.3% | C:47.15% H:6.71% N:18.40% |
| Residue Analysis | ||
| Heavy Metals | ≤10mg/kg | Conforms |
| Lead (Pb) | ≤0.50mg/kg | Conforms |
| Microbiological Tests | ||
| Total Plate Count | ≤500cfu/g | 200cfu/g |
| Salmonella | Negative/10g | Conforms |
| Weight | Packing Method |
|---|---|
| 1kg | Bag/kg, outer box (double plastic bag + aluminum foil bag) |
| 25kg+ | By drums or carton (2 layers plastic bag inside) |
