Calcium Naphthenate Rubber Vulcanization Accelerator from Canada
Calcium naphthenate accelerates sulfur vulcanization in tire and rubber compound production as a naphthenic metal salt. Falls under HTS 3824.99.7550 for other such preparations in polymer processing. Improves cure rate and scorch safety.
Duty Rate — Canada → United States
13.7%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Rheometer cure curves validate accelerator function; declare processing aid status
• Low metals spec for cleanliness; DOT tire regs if end-use specified
• Not 3812—rubber accelerators there are organic amines/sulfides