CN code 320420 covers synthetic organic products used as fluorescent whitening agents (FWAs, optical brighteners, luminophores). These substances absorb ultraviolet radiation and emit visible light in the blue range, creating the visual effect of whiteness and brightness. They are used in the manufacture of detergents, paper, textile fibres, and plastics. The most commonly used are stilbene and coumarin derivatives. Classification requires confirmation of the luminophore function and synthetic organic character. Inorganic luminophore products are classified under other headings.

Fluorescent whitening agents are subject to full REACH and CLP requirements. Substances must be registered with ECHA. Some FWAs may be classified as irritant or sensitising. Brightening agents used in detergents are subject to additional requirements under Regulation (EC) No 648/2004 on detergents. FWAs used in food contact materials must comply with Regulation (EC) 1935/2004. A Safety Data Sheet is mandatory. Transport of solid products does not usually pose specific ADR hazards unless dissolved in organic solvents.

When importing luminophores under CN code 320420, the chemical specification, CAS number, intended use, and commercial form should be presented. The FWA market is dominated by several global manufacturers, with major facilities in China, India, and Europe. Importers may benefit from EU tariff preferences. Quality control includes purity determination, brightening strength, and stability. Export of FWAs is not subject to special export control restrictions. Verification of current duty rates in the TARIC database is recommended.

When importing Synthetic products used as fluorescent (CN 3204 20) into the EU, VOC content regulations under Directive 2004/42/EC must be considered. Decorative paints and automotive refinish products have established VOC limits. CLP classification requires appropriate GHS pictogram labelling on packaging. Pigments containing heavy metals (lead, cadmium, chromium VI) are subject to strict REACH restrictions (Annex XVII). Importers must have SDS sheets and ensure labelling complies with destination country regulations.