Solving Problems with Chemicals

GOOGLE TRANSLATOR

Air Duster : Cleans Electronics and Equipment with Pressurized Air Jet



Air duster is a dust and particulate remover using pressurized gas. It delivers inert, moisture- and residue-free, and  high velocity air jet which is ideal for cleaning electronics and precision parts.

 1,1-difluoroethane,  and 1,1,1,2-tetrafluoroethane are commonly used in gas dusters as the source of clean gas for the functional cleaning. Although the scientific names of the chemicals sound complicated, one might be surprised to know that they are actually the common refrigerants used in air condition units:  R 152a and R 134a, respectively. Tetrafluoroethane is also found to be useful as a blend component for certain refrigerants, propellant for aerosols, blowing agent for extruded polystyrene foams. It has been replacing the more global warming potential ( GWP ) CFC R12 ( dichlorodifluoromethane ) and HCFC R22 ( chlorodifluoromethane ).

 These two fluoro-chemicals  have low boiling points with -26.1 degC for tetrafluoroethane, and -24.7 degC for the difluoroethane. Therefore, they appear in gaseous forms at room temperature. Because of the low vapour pressure property,  both the haloalkanes can be compressed to form  liquefied gas in closed pressurized can.

In the context of air duster, upon pulling the trigger of a gas duster,  the liquid contained in the aerosol can evaporates rapidly and yields a powerful blast of air jet.  A series of short blasts during application is recommended.

Caution should be taken for inhalant abuse. It is an act of deliberate sniffing of  chemicals and solvent found in common household products to obtain a "high". ( Important: Some of  these gases are potential asphyxiants that can induce or tend to induce asphyxia ).



Ambersil Air Duster


Ambersil Air Duster -- contains a liquefied gas which provides a dry, powerful blast for removal of dust and other loose contaminants from electronics, equipment, and sensitive devices. This product has been formulated without the use of any ozone depleting  HCFCs or CFCs.

Applications:
* A convenient tool for instant cleaning of  inaccessible areas or the use of cleaning solvents is not desirable.
* Safe on plastics, rubbers, painted surfaces.
* Can be used safely and efficiently on: photocopiers, computers, fax machines, microscopes, cameras, oscilloscopes, lenses, watches.

Cautions:
-- It is not advisable to spray an air duster directly into a powered projector. Some fluoroalkanes may break down into toxic substances when exposed to high heat from projection lamp. Thermal decomposition products:  hydrogen fluoride, carbonyl  fluoride, carbon oxides
 -- Not all air dusters are suitable for cleaning internal parts of electronics, PCB, or cameras due to  diverse formulations. One should always read the label and check with the manufacturer to determine its flammability and chemical compositions. 
 -- Do not shake or turn the can upside down.



Did you know?
In order to prevent inhalant abuse, bittering agent  is added into formulations of some so-called canned air products, gas dusters, or air dusters - for example 3M Dust Remover, rendering the contents/gas extremely unpleasant to inhale.

Denatonium benzoate is one of the bitterants which leaves an extremely bitter taste upon contact with one's mouth. As far as air duster is concerned, bittering agent acts as a safety additive to discourage inhalation abuse.


You may also like: