Legradi, L. published the artcileMechanism of adsorption indication. IX. Phthaleins as adsorption indicators, Related Products of benzofurans, the publication is Acta Chimica Academiae Scientiarum Hungaricae (1971), 69(2), 157-61, database is CAplus.
α-Naphtholphthalein is suitable for the argentometric titration of Cl-, Br-, and NCS- ions; phenolphthalein for Br- and I- ions; and thymolphthalein for Cl-, Br-, and I- ions. The mixtures of thymolphthalein and α-naphtholphthalein or phenolphthalein and thymolphthalein are good adsorption indicators at pH 7-9; α-naphtholphthalein can be used without mading the solution alk. The phthalein indicators act on the basis of surface precipitation The Ag salt of the dye was detected on filter paper by a color reaction and was isolated by precipitation
Acta Chimica Academiae Scientiarum Hungaricae published new progress about 596-01-0. 596-01-0 belongs to benzofurans, auxiliary class Benzofuran,Naphthalene,Alcohol,Ester, name is 3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one, and the molecular formula is C28H18O4, Related Products of benzofurans.
Referemce:
https://en.wikipedia.org/wiki/Benzofuran,
Benzofuran | C8H6O – PubChem