品级Grade 细胞培养级 (for cell culture,≥95.0%) 外观Appearance 橙黄色粉末 红外光谱鉴定Infrared spectrometry 和对照品匹配 纯度Purity (dried subst.) ≥95.0% (Spectrophotometry) 水分Water <6 % (K.F.) pH 1 % in water 6.5 ± 0.5 uv-vis spectrum at ph 7.0 EMM = 10.5 to 11.8 at λ max 448 to 450nm EMM = 8.5 to 9.5 at λ max 375 to 377nm 细胞培养测试Cell culture test pass