2931.90.90/Methyllithium (15% in Diethyl Ether)/China

Methyllithium (15% in Diethyl Ether) from China

Methyllithium solution contains lithium-carbon bonds defining organolithium classification under 2931.90.90. Used as strong base/non-nucleophile in pharma synthesis; chapter note V(D) classifies metal alcoholates similarly.

Duty Rate — China → United States

41.2%

Rate breakdown

9903.88.0425%Except as provided in headings 9903.88.33, 9903.88.34, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(g) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(g)

9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China

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Import Tips

• UN3393 solution packaging; ether stabilizer must be declared for flammability

• Nucleophilic reagent—DEA watches for diversion to clandestine synthesis

• Verify solvent content doesn't trigger Ch38 mixture classification