N-Oxydiethylenebenzothiazole-2-Sulfenamide (NOBS/MBS) from Japan
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 — Japan → United States
15%
Rate breakdown
9903.04.6211.3%Pharmaceuticals: patented pharma from JP/EU/KR/CH/LI — 15% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
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