CAS号:   62625-32-5

分子式:   C21H13Br4NaO5S

分子量:   720.00

别名:      溴甲酚绿钠盐

品级Grade                                分析纯  
                                          (AR)
外观Appearance                          Dark green to black powder or crystals
红外光谱鉴别Infrared spectrum           Conforms to structure
纯度Purity(HPLC)                        ≥90.0%  
PH变色范围Visual range                  3.8(yellow)-5.4(blue)
灼烧残渣Residue on ignition(as sulfate) 8.5-11.5%


项目（name）                     指示剂（Ind）
                              (indicator grade）
水溶解试验                        合格
PH变色范围                       3.8(黄色)-5.4(蓝色)
灼烧残渣(以硫酸盐计)             8.5-11.5%


品级Grade                               高纯级  
                                       (High pure)
外观Appearance                          暗绿色至棕色、黑色粉末或结晶
红外光谱鉴别Infrared spectrometry       Conforms
纯度Purity                              98.0 to 105.0 % (以干基计)  
pH变色域Transition interval:            pH 3.8 (yellow) to pH 5.4 (blue)
灵敏性试验Sensitiveness test            Pass



品级Grade                                ACS级  
                                     (ACS reagent, 90 %)
外观Appearance                          暗绿色至棕色、黑色粉末或结晶
红外光谱鉴别Infrared spectrometry       Conforms
纯度Purity                              ≥90.0% (HPLC)
λ                                       614 - 618 nm
                                        c = 0.01g/L, Water
消光系数Extinction Coefficient          ≥25000
λ                                       394 - 406 nm
消光系数Extinction Coefficient          ≥8000  
λ                                       306 - 310 nm
消光系数Extinction Coefficient          ≥10000
pH变色域Transition interval:            pH 3.8 (yellow) to pH 5.2 (blue)
Visual Interval                         Pass
                                        pH 3.8 = Yellow  
Visual Interval                         Pass
                                        pH 4.5 = Green
Visual Interval                         Pass
                                        pH 5.4 = Blue
不溶物Insoluble Matter.                c = 0.1g/100ml; Water