div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imagea href=https:reader042fdocumentsusreader042viewer2022020523575068201a28ab0f07aeb8fehtml5page1jpg target=_blank img data-url=documentpaper-chromatography-of-2-halogenated-carboxylic-acids-nn-dimethyl-p-phenylazoanilinehtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: Paper Chromatography of 2-Halogenated Carboxylic Acids : NN-Dimethyl-p-phenylazoaniline as an Acid-Base Indicator Reagent loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader042fdocumentsusreader042viewer2022020523575068201a28ab0f07aeb8fehtml5thumbnails1jpg width=140 height=200 adivp© 1962 Nature Publishing Grouppdiv