溴甲酚绿
Bromocresol green
CAS号: 76-60-8
分子式: C21H14Br4O5S
分子量: 698.01
别名: 溴甲酚蓝;四溴间甲酚磺酚酞
GB/T 15349-94
项目Item 分析纯
(AR)
变色域Visual transition interval 3.8(黄绿)~5.4(蓝)
最大吸收波长(nm)Wave length of
max absorbance
λ1 (pH 3.8) 440-445
λ2 (pH 5.4) 615-618
质量吸收系数Absorbance,L/cm·g
α1(λ1,pH 3.8,干样) 24-28
α2(λ2,pH 5.4,干样) 53-58
乙醇溶解试验Solubility in ethanol 合格
干燥失重Drying loss,% ≤3.0
灼烧残渣(以硫酸盐计)Ignition residue,% ≤0.25
品级Grade ACS级
(ACS reagent, Dye content 95 %)
外观Appearance 褐色至棕色粉末
红外光谱鉴别Infrared spectrometry Conforms
纯度Purity ≥95.0% (HPLC)
λ 422 - 426 nm
Extinction Coefficient ≥17000
c = 0.03g/l; Acified Methanol
Appearance (Clarity) Pass
Visual Interval Pass
pH 3.8 Yellow
Visual Interval Pass
pH 4.5 Green
Visual Interval Pass
pH 5.4 Blue
品级Grade ACS级
外观Appearance 褐色至棕色粉末
红外光谱鉴别Infrared spectrometry Conforms
Visual Interval Pass
pH 3.8 Yellow
Visual Interval Pass
pH 4.5 Green
Visual Interval Pass
pH 5.4 Blue