详细说明：

Item

Standard

Appearance

White to off-white powder

** rotation[α]20/D

(C=1

in H2O)

+38°+ 2°

State of solution

(Transmittance)

Not

less than 98.0%

Chloride (Cl)

Not more than 0.020%

Sulfate(SO4)

Not more than 0.020%

Ammonium (NH4)

Not more than 0.020%

Heavy metal(Pb)

Not more than 10ppm

Loss on drying

Not more than 0.20%

Residue on ignition(sulfated)

Not more than 0.10%

Assay

Not

less than 99%

产品参数：

英文名称：D-Histidine   分子式/结构式: C₆H₉N₃O₂   分子量(Mr): 155.1546   密度(g/l)：1.423g/cm3   沸点 : 458.9°C at 760 mmHg