孟加拉玫瑰红

Rose bengal

CAS号: 632-69-9

分子式: C20H2Cl4I4Na2O5

分子量: 1017.64

别名: 虎红钠盐，酸性红94，四氯四碘荧光素二钠，孟加拉玫瑰红B，四氯四碘荧光素

项目                                    生物指示剂级  
                                           (BR)
pH（0.5 g/L，25℃）                      6.0～8.0  
层析试验                                  合格  
水溶解试验Solubility(in water)            合格
灼烧残渣Residue ignition                 ≤18.0%  


90%:

外观Appearance                          波尔多红至棕红色结晶粉末
红外光谱鉴别Infrared spectrometry       和对照品匹配
染料含量Dye-content                     >90 %
干燥损失Loss on drying                  <5 % (105°C)
λ max                                   545 - 550 nm (in water)
吸光率Absorpt. Ratio P-15/P+15          1.21 - 1.95



95%高纯级：

外观Appearance                          红色至棕色粉末或结晶
红外光谱鉴别Infrared spectrometry       Conforms
纯度Purity                              ≥95.0% (HPLC)  
λ 546 - 550 nm
  c = 0.004g/L H2O + 1ml 1% Na2CO3
消光系数Extinction Coefficient          ≥98000
λ 513 - 517 nm
消光系数Extinction Coefficient          ≥32000
λ 350 - 354 nm
消光系数Extinction Coefficient          ≥3000
λ 311 - 315 nm
消光系数Extinction Coefficient          ≥12000
λ 262 - 266 nm
消光系数Extinction Coefficient          ≥32000