PHOTOCHROMIC DYE WHICH IS A SYNTHETIC ORGANIC COLOURING MATTER. THE DYE, WHEN MIXED WITH OTHER INGREDIENTS, IS USED TO COAT PLASTIC LENSES. WHEN EXPOSED TO LIGHT THE DYES DARKEN. THE CHEMICAL NAME FOR THE DYE IS: 13-ISOPROPYL-3,3-BIS(4-METHOXYPHENYL)-6,11-DIMETHYL-3,13-DIHYDROBENZO [h]INDENO[2,1-f]CHROMEN-13-OL

GENERAL RULES 1 AND 6 FOR THE INTERPRETATION OF THE COMBINED NOMENCLATURE. THE TEXT TO TARIC CODES 3204, 3204 19, 3204 19 00 AND 3204 19 00 30. THE HARMONISED SYSTEM EXPLANATORY NOTES TO HEADING 3204, SECTION (I).