Appearance
A white or yellowish-white powder

Identificaiton
Concordant with the reference standard spectrum

Clarity and color
Not more intensely colored than reference solution B6, BY6, Y6

Heavy metals
NMT 20ppm

Content of pentetic acid1
0.01~0.03%

Specific optical rotation
-6.28˚~ -6.94˚(as anhydrous basis)

Water
NMT 4.0%

Content of gadolinium1
201~222 mg/g

Assay
95.0~105.0% (as anhydrous basis)