Cyclopentadienyl Manganese Tricarbonyl from Canada
Cyclopentadienyl manganese tricarbonyl (CMT) is an organometallic compound used as an antiknock additive in fuels (MMT precursor). Falls under 2931.90.90.52 as 'other organo-inorganic compounds' with manganese-carbon bonds directly linked.
Duty Rate — Canada → United States
100%
Rate breakdown
9903.04.6096.3%Pharmaceuticals Annex IV: patented pharma articles — 100% 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
• EPA registration required for fuel additive use; include TSCA inventory status
• Classify as UN 3388 organometallic substance; use Type 4J1 drums maximum
• Provide spectral analysis confirming Mn-C bonds to prevent Chapter 28 misclassification