(CAS No. 27344–41–8) of a kind used as a fluorescent brightening agent (provided for in subheading 3204.20.80) Free No change No change On or before 12/31/2025 . 11415. Optical Brightener SWN Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.23.45 7-(Diethylamino)-4-methylchromen-2-one (CAS No. 91–44–1) (provided for in subheading 3204.20.80) Free No change No change On or before 12/31/2025 . 11416. C.I. Fluorescent Brightener 199:1 Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.23.46 Mixtures of 1-(2-cyanostyryl)-4-(4-cyanostyryl)benzene (CAS No. 13001–38–2)