外观Appearance                            白色或类白色粉末
红外光谱Infrared Spectrum                 Conforms
纯度Purity                                ≥99.0 % (中和滴定)
水分Water                                 <4 % (K.F.)
紫外光谱UV                                200 nm A: <0.15
220 nm A: <0.05（0.005 M 水溶液)

品级Grade                               离子色谱级  
(for ion pair chromatography)
纯度Purity                               ≥99.0% (T)
λ 10 % in H2O
UV absorption
λ: 210 nm A:                           ≤0.05
λ: 220 nm A:                           ≤0.04
λ: 230 nm A:                           ≤0.03
λ: 260 nm A:                           ≤0.02
λ: 500 nm A:                           ≤0.02
RP gradient test                         corresponds to standard
filter test                              corresponds to standard