Description

Lewisite is a potent organoarsenic compound, historically significant as a chemical warfare agent. Today, it serves as a critical reference standard and research chemical for the development of detection methods, protective equipment, and medical countermeasures. This high-purity material is essential for analytical laboratories, defense contractors, and government research agencies focused on chemical threat verification and safety protocol validation. Lewisite CAS NO 541-25-3 is supplied under strict quality control for specialized applications.

Application

• Analytical Reference Standard: Used as a certified standard for calibrating detection equipment (e.g., GC-MS, FTIR) in chemical security and verification programs.
• Defense & Security Research: Critical for testing and evaluating the efficacy of personal protective equipment (PPE), decontamination solutions, and filtration systems.
• Medical Countermeasure Development: Employed in biomedical research to study toxicology, mechanism of action, and to develop potential antidotes and treatments for exposure.
• Forensic Analysis: Utilized by forensic and treaty verification laboratories for the unambiguous identification of chemical warfare agents in samples.
• Environmental Fate Studies: Applied in controlled studies to understand the degradation, persistence, and environmental impact of organoarsenic compounds.
• Chemical Synthesis Intermediate: Serves as a specialized reagent in the synthesis of other organometallic and arsenic-containing compounds for research purposes.

Basic Information

Product Name	Lewisite
CAS No.	541-25-3
Molecular Formula	C2H2AsCl3
Molecular Weight	207.32 g/mol
Synonyms	2-Chlorovinyldichloroarsine; Dichloro(2-chlorovinyl)arsine; L; Agent L; β-chlorovinyldichloroarsine; (2-Chloroethenyl)arsonous dichloride; Arsine, (2-chloroethenyl)dichloro-
EINECS	208-791-8

Quality Control

Every batch of Lewisite is produced and handled under stringent security and quality protocols. Identity and purity are verified using advanced analytical techniques including gas chromatography (GC) and mass spectrometry (MS). We provide comprehensive Certificates of Analysis (COA) detailing assay, impurity profile, and stability data to ensure traceability and reliability for your critical research and defense applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a dedicated, secure, and well-ventilated area at controlled room temperature (15-25°C). Due to its nature as a strong acid/organic solvent and highly toxic compound, it must be isolated from incompatible materials and handled only by trained personnel using appropriate engineering controls and personal protective equipment.

Specification

Item	Specification
Appearance	Colorless to amber oily liquid
Identification (IR)	Conforms to reference spectrum
Assay (GC)	≥ 95.0%
Related Substances (GC)	Total impurities ≤ 5.0%
Water Content (KF)	≤ 0.5%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.