The ISO 6744-2:1999 standard specifies a test method for the determination of phthalic anhydride content in alkyd resins. This standard applies to alkyd resins containing only phthalic acid as a polyacid and does not apply to modified alkyd resins or resins containing benzoic acid. The standard provides an accurate analytical method to ensure that the performance of alkyd resins in paints and varnishes meets technical requirements. The ISO 6744-2:1999 standard is part of the ISO 6744 series and is intended to replace the 1984 revision to improve the accuracy and conformity of testing.