2931.90.90.30/2-Chlorovinyldichloroarsine (Lewisite 1)/Japan

2-Chlorovinyldichloroarsine (Lewisite 1) from Japan

2-Chlorovinyldichloroarsine is a highly toxic organoarsenic compound classified under HTS 2931.90.90.30 as an other organo-inorganic compound where arsenic is directly linked to carbon. It features a vinyl chloride group attached to arsenic dichloride, fitting Chapter 29's scope for separate chemically defined organic compounds with metallic elements.

Duty Rate — Japan → United States

15%

Rate breakdown

9903.04.6211.3%Pharmaceuticals: patented pharma from JP/EU/KR/CH/LI — 15% 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)

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Import Tips

• Obtain special licenses from BIS and ATF due to its status as a chemical weapon precursor; ensure UN-approved packaging for toxic substances

• Verify chemical purity documentation to avoid reclassification; common pitfall is inadequate hazard labeling leading to customs holds