Gao, Zhumei published the artcileAcidity determination of oxidation solution from phenol production with 1- naphtholphthalein as indicator, Recommanded Product: 3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one, the publication is Shihua Jishu Yu Yingyong (2010), 28(1), 56-57, database is CAplus.
The acidity of oxidation solution from phenol production was determined with 1-naphtholphthalein as indicator instead of phenolphthalein, and the accuracy was investigated. The results showed that when 1-naphtholphthalein was used as indicator, the pH value at end point was 8.69, similar with the theor. pH value at end point 8.70. The determination results of organic acid samples whose acidity was known as 288mg/kg indicated that the deviation for 1-naphtholphthalein was 3 mg/kg, while 102mg/kg for phenolphthalein.
Shihua Jishu Yu Yingyong 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, Recommanded Product: 3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one.
Referemce:
https://en.wikipedia.org/wiki/Benzofuran,
Benzofuran | C8H6O – PubChem