Formula:

C₁₀H₁₄N₂O₅

Mol.weight:

242.23

CAS No.:

[50-89-5]

EINECS No.:

200-070-4

Description:

White crystalline powder

Clarity&color of solution:

Colorless and clear

Identification:

Conforms to the ref. IR spectrum

Purity(HPLC):

99.5%min.(area percent)

Assay(UV absorption):

98.0%～102.0%(on dry basis)

Ratios(abs.max.267nm,

A250/A260=0.63～0.67

ε=9,600±4%,PH7):

A280/A260=0.70～0.74

Melting point:

185℃～190℃

Loss on drying:

0.5%max.(at 105℃/2h.)

Moisture(K.F.):

0.1%max.

Residue on ignition:

0.1%max.

Related substances(HPLC):

• Thymine
• Total impurities

0.2%max.(area percent) 0.5%max.(area percent)

Heavy metals(as Pb):

10ppm max.