This standard specifies the measurement of the acid content of industrial phthalate esters by titration using phenolphthalein as an indicator. This standard is used in conjunction with Part 1.
JIS K 6751-2:1999 history
1999JIS K 6751-2:1999 Testing methods for phthalic esters -- Part 2: Determination of acidity to phenolphthalein -- Titrimetric method