L-HISTIDINE HYDROCHLORIDE MONOHYDRATE For Biochemistry

Description

Physical state at 20 °C	Solid	Colour	White crystalline
pH value	3 – 4 at 105 g/l at 25 °C	Melting point/ Freezing point [°C]	254 °C
Solubility in water [% weight]	105 g/l at 20 °C – completely soluble

Appearance	White crystalline powder
Assay (argentometric; on dried basis)	Min 99%
Specific optical rotation ([α]20/D)	+8.5 to +9.5 deg
Heavy metal (as Pb)	Max 0.001%
Ammonium (NH4)	Max 0.01%
Foreign amino acids	Max 0.3%
Other ninhydrin positive substances (as glycine)	Max 0.1%

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