Dibutylthiourea Powder
Pure dibutylthiourea in powdered form, a chemically defined organo-sulfur compound used primarily as a rubber accelerator in tire manufacturing. It falls under HTS 2930.90.71.00 as it is specifically enumerated within heading 2930 for organo-sulfur compounds other than those excluded. The product contains sulfur directly linked to carbon atoms, fitting Chapter 29 note definitions.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If when compounded with rubber antioxidants or other additives at >10% concentration
Blends formulated specifically as rubber accelerators are classified under Chapter 38 as compound rubber additives rather than pure organic compounds.
If imported as a technical-grade mixture with impurities exceeding 1% or diluents
Chapter 29 excludes mixtures; impure preparations fall under prepared chemical products in 3824 unless proven as qualifying under Chapter 29 notes.
If containing additional nitrogen heterocyclic functions beyond thiourea structure
Other organic compounds with nitrogen functions may shift to heading 2942 if the molecule's primary character changes from organo-sulfur.
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Import Tips & Compliance
• Provide detailed chemical analysis and Certificate of Analysis (CoA) confirming 99%+ purity to avoid reclassification as a mixture under 3824
• Ensure SDS includes GHS hazard classification as it may be skin sensitizing; comply with TSCA registration for chemical imports
• Declare exact CAS number (5392-85-6) on commercial invoice to match HTS specificity and prevent duty disputes
Related Products under HTS 2930.90.71.00
Dibutylthiourea Flakes (Industrial Grade)
Dibutylthiourea supplied in flake form for industrial rubber vulcanization processes, meeting Chapter 29 requirements for separate chemically defined compounds. Classified specifically under 2930.90.71.00 due to its thiourea structure with sulfur-carbon linkage. Used in synthetic rubber production for automotive belts and hoses.
High-Purity Dibutylthiourea (Lab Grade)
Laboratory-grade dibutylthiourea at 99.5% purity, packaged in small quantities for chemical research and analysis. Meets Chapter 29 criteria as a separate chemically defined organic compound under heading 2930.90.71.00. Used in synthetic organic chemistry and polymer testing applications.
Dibutylthiourea with Stabilizer (Transport Grade)
Dibutylthiourea containing minimal anticaking stabilizer as permitted by Chapter 29 note (f), specifically classified under 2930.90.71.00. Designed for safe bulk transport in rubber industry supply chains. The stabilizer does not alter its primary chemical identity or intended use.