Lewisite 1 Technical Grade
Technical grade 2-Chlorovinyldichloroarsine (Lewisite 1) is a synthetic organo-inorganic compound used in chemical research, classified under HTS 2931.90.90.30. The arsenic-carbon bond and chlorine substitutions qualify it as an 'other' organo-inorganic compound per heading 2931 specifications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing phosphorus instead of arsenic linkage
Heading prioritizes organo-phosphorus over arsenic compounds numerically later in 2931
If for saturated acyclic hydrocarbons if dehalogenated
Loss of characteristic As-Cl bonds shifts to basic hydrocarbon classification
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Declare as Schedule 1 chemical under Chemical Weapons Convention; use DOT-approved containers
• Pitfall: Failing to provide SDS can trigger EPA scrutiny; pair with end-use certificates for clearance
Related Products under HTS 2931.90.90.30
2-Chlorovinyldichloroarsine (Lewisite 1)
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.
2-Chlorovinyldichloroarsine Stabilized Solution
A stabilized solution of 2-Chlorovinyldichloroarsine for safe transport, falling under HTS 2931.90.90.30 as per Chapter note (f) allowing stabilizers for preservation. It remains classified as the core organo-inorganic arsenic compound with direct C-As linkage.
Dichloro(2-chloroethenyl)arsine
Dichloro(2-chloroethenyl)arsine, synonymous with 2-Chlorovinyldichloroarsine, is a specific organoarsenic vesicant classified precisely under HTS 2931.90.90.30. Its structure confirms direct arsenic-carbon bonding, excluding it from sulfonated/halogenated derivatives in notes.