Thiourea-Formaldehyde Resin
Thiourea-formaldehyde resin, a primary form amino-resin with thiourea and formaldehyde monomers over 95% by weight, is used in specialty adhesives and molding compounds. Classified in HTS 3909.39.00.00 as 'Other' amino-resins lacking a specific subheading.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If urea-thiourea copolymer with urea predominant
Urea-thiourea copolymers where urea units predominate by weight classify under 3909.20 per subheading note (a)(4).
If imported as finished plastic sheets >38.1cm width
Per US note, processed sheets exceeding size limits lose 'Free (B)' but shift from primary polymers to Chapter 39 finished articles.
If with finishing agents for textile use
Amino-resin finishing agents for textiles classify in 3809, not primary forms.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Conduct FTIR spectroscopy to prove monomer predominance per Chapter 39 notes; label as 'primary form' distinctly from compounded products; check for free trade agreement eligibility under 'C' rates
Related Products under HTS 3909.39.00.00
Melamine-Formaldehyde Resin
Melamine-formaldehyde resin is a thermosetting amino-resin produced by the reaction of melamine with formaldehyde, containing over 95% by weight of these monomer units. It is supplied in primary form as granules or powder for molding into tableware and laminates. Classified under HTS 3909.39.00.00 as 'Other' amino-resins not specifically named elsewhere in the series.
Aniline-Formaldehyde Resin
Aniline-formaldehyde resin is an amino-resin formed from aniline and formaldehyde monomers comprising over 95% by weight, used in plywood adhesives and coatings. It is imported in primary granular form. Falls under HTS 3909.39.00.00 as unspecified 'Other' amino-resins.
Dicyandiamide-Formaldehyde Resin
Dicyandiamide-formaldehyde resin is a thermoset amino-resin in primary powder form, with monomers contributing >95% weight, applied in flame-retardant laminates. It fits HTS 3909.39.00.00 for other amino-resins.
Melamine-Glyoxal Resin
Melamine-glyoxal resin, an amino-resin variant using melamine and glyoxal crosslinkers (>95% monomers), is imported as primary liquid resin for paper coatings. Under HTS 3909.39.00.00 as other amino-resins.
Benzoguanamine-Formaldehyde Resin
Benzoguanamine-formaldehyde resin is a high-performance amino-resin in primary bead form, with named monomers >95% by weight, for automotive coatings. HTS 3909.39.00.00 covers this unspecified type.