Arsole

__ Aersole __
====Aersole also called arsenole or C4H4AsH is classified as a metallole and is a organoarsenic compound with the molar mass of 128.00 g/ mol. Arsole's molecular geometry and electronic configuration have been studied theoretically. Arsole is only moderately aromatic, with about 40% the aromaticity of pyrrole. Aersole belongs to the series of hetercylic pnictogen compounds. Calculations suggest that whereas pyrrole (C4H4NH) molecule is planar, phosphole and heavier metalloles are not and their pnictogen- bonded hydrogen atom extends out of plane. A similar tendency is predicted for the fluorinated C4 F4MH derivatives but the inversion barriers are about 50-100% higher. The planarity is lost even in pyrrole when its nitrogen-bonded hydrogen atom is substituted  with fluorine. Chemical propertied of arsole derivatives have been studied experimentally; they are similar to those phosphole and its derivatives. Substitution of all hydrogen atoms in arsole with phenyl groups yields yellow needles of crysralline pentaphenylasole, which has a melting point of 215 degrees Celsius. ====

Erik Rotheim
On November 23, 1927, Norwegian engineer Erik Rotheim (also spelled Eric Rotheim) patented the first aerosol can and valve that could hold and dispense products and propellant systems. This was the forerunner of the modern aerosol can and valve. In 1998, the Norwegian post office issued a stamp celebrating the Norwegian invention of the spray can.





= Facts About Aerosol Cans =

Aerosol cans are used on a daily basis for several functions, such as hairspray, shaving cream, spray paint and disinfectants. About 90 percent of all aerosol cans are made of steel and the remaining 10 percent are made of aluminum. Both types can be recycled. Here are some facts regarding the disposal and recycling of aerosol cans:

Recycling aerosol cans is important to the environment. Take the next step and recycle your containers properly.
 * All steel containers are made up of an average of 25 percent recycled steel. Using recycled steel for production consumes 65 percent less energy than creating the containers from raw materials. This type of energy savings is enough to light the city of Los Angeles for almost a decade.
 * More than 3 billion steel aerosol cans are made in the U.S. annually. Theoretically, if everyone recycled these containers, there would be enough extra steel to manufacture about 400,000 automobiles.
 * About 19 billion steel containers are recycled and turned into new products each year. This equates to about 600 containers recycled every second.
 * [|Recycling one ton of steel saves about 2.5 tons of iron ore, 1 ton of coal and 40 pounds of limestone] . Using recycled steel also assists in cutting down on water usage and the release of air pollution. This is due to the fact that the process for creating steel from scratch utilizes a large amount of resources, where using recycled steel allows the production of containers to bypass the steel creation stage.
 * Steel containers take about 80 to 100 years to decompose.
 * Consumer aerosol products produced in the U.S have not used chlorofluorocarbons (CFCs) since 1978, when they were banned.

Modern aerosol spray products have three major parts: the can, the valve and the actuator or button. The can is most commonly lacquered [|tinplate] (steel with a layer of tin) and may be made of two or three pieces of metal [|crimped] together. [|Aluminium] cans are also common and are generally used for more expensive products. The valve is crimped to the rig of the can, and the design of this component is important in determining the spray rate. The actuator is depressed by the user to open the valve; the shape and size of the nozzle in the actuator controls the spread of the aerosol spray.