Item

unit

GB16314-1996

characteristic

White or yellow powder

content

%

��95.0

Specific rotation

[ a ]

+21�㡫+24��

Melting point

��

107��117

loss in weight on drying

%

��2.0

Residue on ignition

%

��0.1

Arsenic salt(AS )

%

��0.0003

Heavy metal�� Pb��

%

��0.001