Item

Specification

Appearance

Yellowish-orange to orange crystalline powder.

No visible evidence of contamination by foreign matter

Identification A

The IR absorption spectrum exhibits maxima only at the same wavelengths as that of the reference standard(197k)

Identification B

The retention time of the major peak in the

Chromatogram of the assay preparation

Corresponds to that in the chromatogram of

The standard preparation, as obtained in the assay

Identification C

Meets the requirements of the flame test for Sodium(191)

Heavy metals

Not more than 0.002%

Water

14.5-17.0%

Assay

90.0-96.0% of C14H10N4O5 on the anhydrous basis

Ethanol

Not more than 2000PPM

Methanol

Not more than 2000PPM

Not more than 2000PPM

Not more than 620PPM

Related Compound A

Not more than 0.15%

Related Compound B

Not more than 0.50%

Related Compound C

Not more than 0.30%