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

Methyllithium (15% in Diethyl Ether) from Mexico

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 — 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
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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

Methyllithium (15% in Diethyl Ether) from Mexico — Import Duty Rate | HTS 2931.90.90