UV Curable Photoinitiator Emulsion
Aqueous emulsion of triphenyl sulfonium chloride derivatives used as photoinitiators in UV-curable inks and coatings for electronics manufacturing. Classified under HTS 3824.99.2500 due to its precise composition of the named aromatic sulfonium chlorides in aqueous form with over 5% aromatic content.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If non-aqueous solvent-based
Solvent mixtures of similar photoinitiators fall under other chemical preparations without the aqueous specification.
If when used primarily in paints/varnishes
Photoinitiators formulated for synthetic paints shift to Chapter 32 classification.
If sold as organic composite solvent additive
Mixtures used as additives in organic solvents for industrial use classified differently.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Include manufacturer's certificate of analysis confirming the exact sulfonium compounds and aqueous formulation
• Label containers with GHS hazard pictograms and UN numbers for DOT/CBP hazardous materials compliance
• Avoid classification errors by distinguishing from polymer dispersions (3906) which lack these specific initiators
Related Products under HTS 3824.99.25.00
Nanofabrication Sulfonium Chloride Solution
High-purity aqueous solution of the named sulfonium chlorides for extreme ultraviolet (EUV) lithography in nanofabrication. Classified in HTS 3824.99.2500 due to matching the subheading's specific chemical mixture definition.
Photoresist Developer Solution
An aqueous mixture containing triphenyl sulfonium chloride, diphenyl (4-phenylthio)phenyl sulfonium chloride, and (thiodi-4,1-phenylene)bis(diphenyl sulfonium) dichloride, used as a developer in semiconductor photolithography processes. It falls under HTS 3824.99.2500 because it is a specific aqueous mixture of these aromatic sulfonium compounds exceeding 5% by weight, classified as chemical preparations not elsewhere specified.
Semiconductor Lithography Resist Activator
Specialty aqueous solution containing the precise sulfonium chloride mixture for activating photoresists in microchip fabrication. HTS 3824.99.2500 applies as it matches the subheading's chemical composition requirements for aromatic-containing preparations.
Advanced Packaging Photoresist Mixture
Aqueous preparation of specified sulfonium chlorides used in fan-out wafer-level packaging for mobile processors. Falls under HTS 3824.99.2500 for its defined aromatic sulfonium content in chemical preparations.