Methylcyclopentadienyl Manganese Tricarbonyl from Mexico
MCDC (methylcyclopentadienyl manganese tricarbonyl) is an organomanganese fuel additive with Mn-C bonds, qualifying as organo-inorganic under 2931.90.90. Used as MMT gasoline antiknock agent; chapter notes exclude it from hydrocarbon (Ch27) or inorganic metal (Ch28) classifications.
Duty Rate — Mexico → United States
3.7%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• EPA fuel additive registration required (40 CFR 79); provide formulation data to customs
• Liquid toxic material—UN1736 packaging with secondary containment mandatory
• Document manganese content for CAA SIP compliance in importing states