
| Item | Specification |
| CAS no. | 71-00-1 |
| Description (excerpts) | L-Histidine is a vegan amino acid […] This pure amino acid is produced by bio-fermentation technology using plant based raw materials. |
| Identification | Infrared absorption spectrophotometry, conforms to USP, EP standard |
| Appearance | White or almost white, crystalline powder |
| Solubility | Soluble in water, very slightly soluble in alcohol |
| Assay | 98.5% – 101.0% |
| Specific rotation 20°C | +11.5° to +13.5° |
| Specific rotation 25°C | +12.6° to +14.0° |
| State of solution (Transmittance) | Not less than 98.0% |
| pH value | 7.0 to 8.5 |
| Loss on drying | ≤0.2% |
| Residue on Ignition | ≤0.1% |
| Sulfate | ≤0.03% |
| Chloride | ≤0.02% |
| Ammonium | ≤0.02% |
| Iron | ≤10ppm |
| Lead | ≤1ppm |
| Cadmium | ≤0.5ppm |
| Mercury | ≤0.1ppm |
| Arsenic | ≤0.5ppm |
| Individual impurities | ≤0.2% |
| Total impurities | ≤0.5% |
| Total Plate Count | ≤1000cfu/g |
| Yeasts & molds | ≤100cfu/g |
| Coliforms | ≤10cfu/g |
| E.coli | ≤10cfu/g |
| Bacillus cereus | ≤10cfu/g |
| Salmonella | Negative/25g |
| Staphylococcus aureus | Negative/g |
| Clostridium perfringens | ≤10cfu/g |
| Clostridium botulinum | Negative/g |
| Enterobacteriaceae | Negative/g |
| Packaging | 25 kg double polyethylene bags with silica gel in fiber drum |
| Storage condition | Keep container dry and tightly closed. Store at room temperature in a well-ventilated place, away from heat and oxidizing agents. |
| Shelf life | 3 years when stored as above |
| Remarks | Meets the quality requirements of current EP, USP and FCC monographs |



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