2931.90.90.52/Cyclopentadienyl Manganese Tricarbonyl/Japan

Cyclopentadienyl Manganese Tricarbonyl from Japan

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 — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

Calculate with your customs value Verify classification with AI

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