Description
White or almost white powder
Complies with USP

Specific optical rotation
-4.6˚to -5.2˚(t=20℃: λ=436nm)

Assay
98.0-101.0%

Free aromatic amine
≤0.02%

Free iodine
The toluene layer shows no red color

Limit of free iodine
≤0.001%

Heavy Metal
≤0.001%

Free acid or alkali
NMT 1.37ml of 0.01N sodium hydroxide or NMT 0.75ml of 0.01N Hydrochloric acid

Related compounds
≤0.25%

Loss on drying
≤0.5%

Residue on ignition
≤0.1%

Packing
Double PE bags, Preserve in well-closed, light-resistant containers

Packing Size
10Kg(Other pack sizes may be available on request)

Residual solvent Ethanol
NMT 5000ppm