Chlorovinyl dichloroarsine, commonly known as lewisite, is an organoarsenic compound historically developed as a chemical warfare agent. It acts as a vesicant, causing severe blistering of the skin and damage to the respiratory system upon exposure.
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Controlled substances
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CAS 541-25-3
Cyclopentylphenylmethanone
chemical intermediate
(6-Oxopiperidin-2-yl)(phenyl)acetic acid
impurity reference standard for methylphenidate
2-ethylhexyl 4-methoxycinnamate
UV filter in sunscreens
5-(2-hydroxyethylamino)-2-methylphenol
Personal care ingredient
This substance is listed under CWC Schedule 1 (Chemical Weapons Convention). Trade is strictly prohibited without OPCW authorization.
The international HS code for Chlorovinyl dichloroarsine (CAS 541-25-3) is 2931.90.
2931.90
2931 90 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
dichloro(2-chloroethenyl)arsane
GIKLTQKNOXNBNY-UHFFFAOYSA-N
C(=C[As](Cl)Cl)Cl