L-Histidine Hcl
Brand：Hebei Hengguan Chemical Co.,Ltd Category：Food Ingredients Views： times Introduction：项 目 Item 标 准 Specifications 外观 Appearance Wh...
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项 目 Item |
标 准 Specifications |
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外观 Appearance |
White crystals or crystalline powder |
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含量（干基）, Assay, |
99.0%~101.0% |
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pH值 pH value |
3.5 to 4.5 |
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比旋光度 Specific Rotation |
+8.9O ~+9.5O |
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干燥失重, Loss on drying , |
Not more than 0.20% |
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重金属（以Pb计） Heavy metals（as Pb） |
Not more than 10PPM |
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炽灼残渣, Residue on ignition, |
Not more than 0.10% |
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氯化物(以Cl计), Chloride （as Cl） |
16.66% to 17.08% |
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硫酸盐(以SO4计), Sulfate(asSO4), |
Not more than 0.020% |
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砷 (以As计), Arsenic(as As), |
Not more than 1PPM |
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铵盐（以NH4计）， Ammonium (as NH4), |
Not more than 0.02% |
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溶液澄清度 State of solution |
Clear and clolorless Not less than 98.0% |
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铁（以Fe计）, Iron (Fe) , |
Not more than 10PPM |