CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | When pure, a colorless oily liquid solidifying at -13 °C. Impurities cause colors ranging from brown to violet. Faint odor of geranium. Irritating to the eyes and mucous membranes at concentrations below the threshold of odor. Very toxic; used as a war gas. Produces severe vesication (blistering) even through rubber (Merck); absorbed through the skin to produce seven systemic effects. Antidote: dimercaprol (British Anti-Lewisite). Prolonged exposure of container to fire or intense heat may result in violent rupturing and rocketing of container. |
|---|---|
| Color/Form | Colorless liquid when pure; impurities lead to colors ranging from violet to brown. |
| Odor | Faint odor of geranium |
| Boiling Point | 374 °F at 760 mmHg decomposes (EPA, 1998) |
| Melting Point | 32 °F (EPA, 1998) |
| Flash Point | None (EPA, 1998) |
| Solubility | Greater than 10% in ethyl ether; greater than 10% in ethanol |
| Density | 1.888 at 68 °F (EPA, 1998) - Denser than water; will sink |
| Vapor Density | 7.1 (EPA, 1998) - Heavier than air; will sink (Relative to Air) |
| Vapor Pressure | 0.395 mmHg at 68 °F (EPA, 1998) |
| Decomposition | When heated to decomposition it emits toxic fumes of /hydrogen chloride and Arsenic/. |
| Odor Threshold | 1.40X10-2 mg/L (purity of sample: not specified) |
| Kovats Retention Index | 1083 |
| Other Experimental Properties | Solidifies at -13 °C. |
| Chemical Classes | Toxic Gases & Vapors -> Chemical Weapons |
COMPUTED DESCRIPTORS
| Molecular Weight | 207.31 g/mol |
|---|---|
| Hydrogen Bond Donor Count | 0 |
| Hydrogen Bond Acceptor Count | 0 |
| Rotatable Bond Count | 0 |
| Exact Mass | 205.843803 g/mol |
| Monoisotopic Mass | 205.843803 g/mol |
| Topological Polar Surface Area | 0 Ų |
| Heavy Atom Count | 6 |
| Formal Charge | 0 |
| Complexity | 50.8 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 1 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 1 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
Lewisite is an oily, colorless liquid with an odor like geraniums. Mustard-Lewisite Mixture is a liquid with a garlic-like odor. Mustard-Lewisite is a mixture of Lewisite and a sulfur mustard known as HD. Lewisite might have been used as a chemical weapon by Japan against Chinese forces in the 1930s, but such reports have not been confirmed. Any stored Lewisite in the United States must be destroyed before April 2007, as mandated by the Chemical Weapons Convention.