L-Винная кислота

ITEM

STANDARD

Sensory requirements

Smell

Color and texture

Colorless translucent crystals or white powder

Odor

With acid taste

Assay (on dry base of C4H₆O6)

99.7～100.5

Specific rotationα m(25℃,D) [(。).dm².kg^-1]

+12.0～+13.0

As

≤2

Pb

≤2

Residue on ignition  

≤0.05

Loss on drying

≤0.5

Oxalate test

Pass test

Sulfate test

Pass test