品级Grade 分析纯
(AR)
外观Appearance orange-brown to dark green powder
红外光谱Infrared spectrometry Conforms to Structure
水溶解试验Solubility (0.1% in water) clear
pH变色域Transition interval(pH) from pH 6.0 (yellow) to pH 7.6 (blue)
干燥损失Drying loss ≤7.0 %
品级Grade ACS级
(ACS reagent)
外观Appearance orange-brown to dark green powder
红外光谱Infrared spectrum Conforms to Structure
Wavelength 614 - 618 nm
c = 0.005 g/l; 0.1 N NAOH
消光系数Extinction Coefficient ≥35000
Wavelength 392 - 396 nm
消光系数Extinction Coefficient ≥8000
Wavelength 305 - 309 nm
Extinction Coefficient ≥13000
变色域Vis. transition interval from pH 6.0 (yellow) to pH 6.7(Green)to pH 7.6 (blue)
溶液澄清度Clarity of solution Clear to Very Slightly Hazy Orange to Black