N-Oxydiethylenebenzothiazole-2-Sulfenamide (NOBS/MBS) from China
NOBS provides delayed vulcanization with rapid curing rates, ideal for thick rubber articles like tires. This sulfenamide's principal rubber processing function places it under HTS 2930.90.92.31 as a chemically defined organo-sulfur compound.
Duty Rate — China → United States
16.2%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Specify 'sulfenamide accelerator' on commercial invoice with CAS 102-77-2
• Purity >96% required for this classification; lower grades become mixtures
• Shelf life declaration important as these decompose over time