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L-Histidine

Product Name: L-Histidine
Molecular Formula: C6H9N3O2
Molecular Weight: 155.16 
CAS No: 71-00-1






Product Specifications


L-Histidine USP32
Assay 98.5-101.5%
PH 7.0-8.5
Specific rotation[a]D20 /
Specific rotation[a]D25 +12.6°-+14.0°
Transmittance(T430) /
Chloride(Cl) ≤0.05%
Ammonium(NH4) /
Sulfate(SO4) ≤0.03%
Iron(Fe) ≤30PPM
Heavy metals(Pb) ≤15PPM
Arsenic /
Other amino acids individual impurities≤0.5% total impurities≤2.0%
Ninhydrin-positive substances /
Loss on drying ≤0.20%
Residue on ignition ≤0.40%

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