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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If supplied pre-mixed with zinc salts or other vulcanization activators
Composite accelerators containing dibutylthiourea as principal component but with additives shift to 3812 as formulated rubber chemicals.
If certified as aromatic thiourea derivative despite dibutyl substitution
Other specified organo-sulfur compounds in 2930.90.29 may apply if Customs interprets butyl chains differently from enumerated dibutylthiourea.
If technical grade with stabilizer additives for transport stability
Chapter 29 note (f) allows stabilizers only if necessary for preservation; excess additives make it a preparation of 3824.
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
• Verify flake purity via HPLC certificate; impurities >2% risk reclassification to mixtures under 3824
• Include end-use statement specifying rubber accelerator application to support Chapter 29 classification over Chapter 38
• Package in UN-approved fiber drums with proper sulfur compound labeling to meet DOT hazardous material transport rules
Related Products under HTS 2930.90.71.00
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.
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.