Description:
This product is light yellow to brownish yellow powder with melting point 279 ℃ (begins to decompose).It is easily soluble in sodium hydroxide solution,soluble in methylalcohol,alcohol and benzene,slightly soluble in water(about  0.4g/100ml).It  is used as acid-base indicator,the pH color range is form 3.0(yellow) to 4.6(purple).It is also used for adsorption indicator.This product should be sealed in a cool and dry place.