Xanthine
Molecular Formula:
C5H4N4O2
Formula Weight:
152.11
PRODUCT SPECIFICATIONS
Form: White to off-white crystalline powder
Assay (Total UV): ≥ 98% (dry basis)
Chromatography (TLC): Homogeneous
Identity: By IR
λmax: 284 nm ± 1 nm (1N NaOH)
εmax:[9.4 ± 0.2] x 103 (1N NaOH)
Spectral Ratios (1N NaOH):
A250/A260: 1.11 ± 0.04
A280/A260: 2.39 ± 0.04
Loss on Drying: ≤ 1.0%
Heavy Metals: ≤ 10 ppm
Reference Constants:
λmax (pH 10, NRC): 277 nm
εmax (pH 10, NRC): 9.3 x 103
ε260 (pH 10, DBR): 5.2 x 103
CAS: 69-89-6
