USD $1.00-6.00 / Kilogram
USD $1.00-10.00 / Kilogram
USD $1.00-6.00 / Kilogram
USD $1.00-6.00 / Kilogram
USD $2.00-5.00 / Kilogram
USD $2.00-6.00 / Kilogram
USD $2.00-5.00 / Kilogram
USD $2.00-5.00 / Kilogram
USD $1.00-6.00 / Kilogram
aji92 /usp standard
l-histidine
appearance |
white crystals or crystalline powder |
specific rotation[a]d25 |
+12.6°~ +14° |
chloride(cl) |
≤0.05% |
sulfate(so4) |
≤0.03% |
iron(fe) |
≤0.003% |
heavy metals(pb) |
≤0.0015% |
loss on drying |
≤0.02% |
residue on ignition |
≤0.40% |
chromatographic purity |
any individual impurity: ≤0.5% total impurities≤:2.0% |
organic volatile impurity |
meets the requirements |
assay |
98.5%-101.5% |
ph |
7.0-8.5 |